U.S. Federal Reserve Chair Jerome Powell sits next to Federal Reserve Bank of Boston President Eric Rosengren during a bus ride amid a presentation by the East Hartford CONNects, a Working Cities Challenge initiative, and community residents' project at Silver Lane Elementary School in East Hartford, Connecticut, U.S., November 25, 2019. REUTERS/Brendan McDermid

Soccer Football - Premier League - Sheffield United v Liverpool - Bramall Lane, Sheffield, Britain - September 28, 2019 General view of fans as the Liverpool team bus arrives at the stadium before the match Action Images via Reuters/Carl Recine EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Soccer Football - Premier League - Sheffield United v Liverpool - Bramall Lane, Sheffield, Britain - September 28, 2019 General view as the Liverpool team bus arrives at the stadium before the match Action Images via Reuters/Carl Recine EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

A tourist bus with a picture of a Native American pulls away from Union Station train and bus terminal as travelers stand in the drop-off lanes in Washington, U.S. November 20, 2018. REUTERS/Jonathan Ernst

An empty bus lane is seen during a 24-hour national strike in Buenos Aires, Argentina, Argentina, June 25, 2018. REUTERS/Martin Acosta

Soccer Football - Championship - Sheffield United vs Leeds United - Bramall Lane, Sheffield, Britain - February 10, 2018 Leeds United Manager Paul Heckingbottom steps off the team bus after arriving at the stadium Action Images/Craig Brough EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Soccer Football - Championship - Sheffield United vs Leeds United - Bramall Lane, Sheffield, Britain - February 10, 2018 Leeds United Manager Paul Heckingbottom steps off the team bus after arriving at the stadium Action Images/Craig Brough EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Soccer Football - Championship - Sheffield United vs Leeds United - Bramall Lane, Sheffield, Britain - February 10, 2018 Leeds United Manager Paul Heckingbottom steps off the team bus after arriving at the stadium Action Images/Craig Brough EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Argentina's Transportation Minister Guillermo Dietrich (C) talks to the media at a soon-to-be completed bus lane in the working-class district of La Matanza, in Buenos Aires province, Argentina April 26, 2017. REUTERS/Luc Cohen

A bus arrives at a soon-to-be completed bus lane in the working-class district of La Matanza, in Buenos Aires province, Argentina April 26, 2017. REUTERS/Luc Cohen

An empty bus lane is seen during a 24-hour national strike in Buenos Aires, Argentina April 6, 2017. REUTERS/Martin Acosta

A man rides his bicycle on an empty public bus lane during a 24-hour national strike in Buenos Aires, Argentina April 6, 2017. REUTERS/Martin Acosta

Police take protestors to an awaiting bus after arresting them for blocking the southbound lane of Interstate 35W in protest of the killing of Philando Castile in Minneapolis, Minnesota, U.S., July 13, 2016. Castile was fatally shot by police July 6, 2016. REUTERS/Eric Miller

An Indonesian police officer (L) stops a car on a public bus lane on a main road in Jakarta, Indonesia, April 28, 2016. REUTERS/Beawiharta

From R-L, French President Francois Hollande, Prime Minister Manuel Valls, Justice Minister Christiane Taubira, Health Minister Marisol Touraine, and Interior Minister Bernard Cazeneuve attend a ceremony to pay a national homage following a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

From R-L, French Prime Minister Manuel Valls, Justice Minister Christiane Taubira, Health Minister Marisol Touraine, Interior Minister Bernard Cazeneuve, and French junior minister for Transport, Maritime Economy and Fishery Alain Vidalies attend a ceremony to pay a national homage following a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

The families of victims and survivors attend a ceremony to pay a national homage following a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

Two men comfort each other during a ceremony to pay homage to the victims of a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

Two men comfort each other during a ceremony to pay homage to the victims of a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

Mayor of Bordeaux Alain Juppe (C) reacts during a memorial ceremony for the victims of the accident in Petit-Palais-Et-Cornemps, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

France's President Francois Hollande (R) and French Prime Minister Manuel Valls attend a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

French President Francois Hollande (R) comforts families of the victims and survivors as he attends a ceremony to pay homage after a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

From R to 3rdR, French President Francois Hollande, Prime Minister Manuel Valls and Interior Minister Bernard Cazeneuve meet French gendarmes before the memorial ceremony for the victims of a fatal accident in Puisseguin, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

From R-3rdR, French President Francois Hollande, Prime Minister Manuel Valls and Interior Minister Bernard Cazeneuve meet French gendarmes before the memorial ceremony for the victims of a fatal accident in Puisseguin, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

France's President Francois Hollande, members of French government and families attend a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (R) and Prime Minister Manuel Valls meet French gendarmes before the memorial ceremony for the victims of a fatal accident in Puisseguin, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

French President Francois Hollande (L) comforts the families during a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (R) and Prime Minister Manuel Valls meet French gendarmes and fire brigade members before the memorial ceremony for the victims of a fatal accident in Puisseguin, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

French President Francois Hollande (C) comforts the families during a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande reacts as he arrives to meet gendarmes before the memorial ceremony for the victims of a fatal accident in Puisseguin, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

France's President Francois Hollande (2ndL) comforts Patricia Raichini, mayor of Petit-Palais-Et-Cornemps, and the families during a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (R) and Prime Minister Manuel Valls (L) arrive to meet French gendarmes before the memorial ceremony for the victims of a fatal accident in Puisseguin, France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Caroline Blumberg/Pool

French President Francois Hollande (L) comforts the families during a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (L) shakes hands with the families during a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (L) shakes hands with the families during a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (C) delivers a speech at a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

The families of victims and survivors attend a ceremony to pay a national homage following a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

Families arrive at a ceremony to pay homage of the victims after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

The families of victims and survivors attend a ceremony to pay a national homage following a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (R) delivers a speech at a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

French President Francois Hollande (R) delivers a speech at a ceremony to pay homage to the victims of a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

Patricia Raichini, mayor of Petit-Palais-et-Cornemps, reacts during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

Two women comfort each other as France's President Francois Hollande (unseen) delivers his speech during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande (R) comforts Patricia Raichini, mayor of Petit-Palais-Et-Cornemps, during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

(L-3rdL) French Justice Minister Christiane Taubira, Prime Minister Manuel Valls, and France's President Francois Hollande, along with the families of the victims attend a ceremony to pay homage after a fatal bus crash, in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Jean-Pierre Muller/Pool

France's President Francois Hollande (R) comforts families of the victims and survivors as he attends a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

French Prime Minister Manuel Valls arrives at a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

Former French prime minister and Bordeaux's mayor Alain Juppe attends a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

Two women comfort each other as France's President Francois Hollande (unseen) delivers his speech during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande arrives at a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande (R), members of French government and families of victims attend a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande delivers his speech during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande attends a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande (R) and French Prime Minister Manuel Valls attend a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau TPX IMAGES OF THE DAY

France's President Francois (R), French Prime Minister Manuel Valls (2ndR), Justice Minister Christiane Taubira (C), Health Minister Marisol Touraine (2ndL) and Interior minister Bernard Cazeneuve (L) attend a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande (R) and French Prime Minister Manuel Valls attend a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande attends to a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande delivers his speech during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

France's President Francois Hollande delivers his speech during a ceremony to pay homage after a fatal bus crash in Petit-Palais-Et-Cornemps, southwestern France, October 27, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis Duvignau

Trucks transport the covered truck (R) and coach (L) which were removed from the scene of the accident where forty-three people were killed near Puisseguin, France, October 26, 2015. Forty-three people perished on Friday when a bus carrying elderly day-trippers hit a truck head-on and caught fire in France's worst road crash in more than 30 years. The bus and the truck collided near a forested bend on a two-lane road cut into a hillside near Puisseguin in the Gironde region, about 60 km (35 miles) east of Bordeaux. REUTERS/Regis DuvignauATTENTION EDITORS FRENCH LAW REQUIRE THAT VEHICLE REGISTRATION PLAQUES ARE MASKED IN PUBLICATIONS WITHIN FRANCE