Relatives mourn during the funeral of Eulalio Espinoza, one of the three army members who were killed after an attack with explosives on the truck in which they were traveling in the troubled northern area of ​​Paraguay, where drug traffickers and the armed group Paraguayan People's Army (EPP) operate, in Yaguaron, Paraguay July 30, 2021. REUTERS/Cesar Olmedo

Soldiers pay respects during the funeral of Eulalio Espinoza, one of the three army members who were killed after an attack with explosives on the truck in which they were traveling in the troubled northern area of Paraguay, where drug traffickers and the armed group Paraguayan People's Army (EPP) operate, in Yaguaron, Paraguay July 30, 2021. REUTERS/Cesar Olmedo

Relatives mourn during the funeral of Eulalio Espinoza, one of the three army members who were killed after an attack with explosives on the truck in which they were traveling in the troubled northern area of ​​Paraguay, where drug traffickers and the armed group Paraguayan People's Army (EPP) operate, in Yaguaron, Paraguay July 30, 2021. REUTERS/Cesar Olmedo

Relatives mourn during the funeral of Eulalio Espinoza, one of the three army members who were killed after an attack with explosives on the truck in which they were traveling in the troubled northern area of ​​Paraguay, where drug traffickers and the armed group Paraguayan People's Army (EPP) operate, in Yaguaron, Paraguay July 30, 2021. REUTERS/Cesar Olmedo

Relatives mourn during the funeral of Eulalio Espinoza, one of the three army members who were killed after an attack with explosives on the truck in which they were traveling in the troubled northern area of ​​Paraguay, where drug traffickers and the armed group Paraguayan People's Army (EPP) operate, in Yaguaron, Paraguay July 30, 2021. REUTERS/Cesar Olmedo

Relatives mourn during the funeral of Eulalio Espinoza, one of the three army members who were killed after an attack with explosives on the truck in which they were traveling in the troubled northern area of ​​Paraguay, where drug traffickers and the armed group Paraguayan People's Army (EPP) operate, in Yaguaron, Paraguay July 30, 2021. REUTERS/Cesar Olmedo

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

Travellers exit from an arrivals gate at St Pancras International station following the arrival of a Eurostar train from Paris, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, July 30, 2021. REUTERS/Henry Nicholls

An Olympic rings tattoo is seen on a journalist's leg, who is traveling on the media bus during the Tokyo 2020 Olympic Games, Japan, July 30, 2021. REUTERS/Pilar Olivares

A man wearing a face mask pushes his luggage next to a Unilabs container where health technicians perform COVID-19 antigen tests for tourists and citizens in Lisbon, Portugal, July 29, 2021. REUTERS/Nacho Doce

A tourist takes a photo in St. Mark's Square as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Tommaso Cacciari, No Big Ships Committee, poses in a workshop during an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Filippo Olivetti, Bassani Group CEO, poses during an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

View of the Port of Marghera as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Tommaso Cacciari, No Big Ships Committee, attends an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Filippo Olivetti, Bassani Group CEO, attends an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Simone Venturini, Councillor for Tourism and Social Cohesion, poses during an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Tommaso Cacciari, No Big Ships Committee, poses during an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Filippo Olivetti, Bassani Group CEO, attends an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Tommaso Cacciari, No Big Ships Committee, attends an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

View of the Port of Marghera as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Simone Venturini, Councillor for Tourism and Social Cohesion, attends an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Simone Venturini, Councillor for Tourism and Social Cohesion, attends an interview as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

People walk through St. Mark's Square as Venice gears up for a ban on cruise liners that becomes effective on August 1, moving to end years of hesitation and putting the demands of residents and culture bodies above those of the tourist industry, in Venice, Italy, July 28, 2021. Picture taken July 28, 2021. REUTERS/Manuel Silvestri

Mexican citizens queue to be transferred to the U.S. via the international border bridge of Tornillo-Guadalupe to receive a dose of the Johnson & Johnson coronavirus disease (COVID-19) vaccine, during a binational vaccination program, in Ciudad Juarez, Mexico July 28, 2021. REUTERS/Jose Luis Gonzalez

Mexican citizens queue to be transferred to the U.S. via the international border bridge of Tornillo-Guadalupe to receive a dose of the Johnson & Johnson coronavirus disease (COVID-19) vaccine, during a binational vaccination program, in Ciudad Juarez, Mexico July 28, 2021. REUTERS/Jose Luis Gonzalez

Mexican citizens fill out applications before being transferred to the U.S. via the international border bridge of Tornillo-Guadalupe to receive a dose of the Johnson & Johnson coronavirus disease (COVID-19) vaccine, during a binational vaccination program, in Ciudad Juarez, Mexico July 28, 2021. REUTERS/Jose Luis Gonzalez

A Mexican citizen gestures aboard a bus before being transferred to the U.S. via the international border bridge of Tornillo-Guadalupe, to receive a dose of the Johnson & Johnson coronavirus disease (COVID-19) vaccine, during a binational vaccination program, in Ciudad Juarez, Mexico July 28, 2021. REUTERS/Jose Luis Gonzalez

Mexicans are transferred to the U.S. via the international border bridge of Tornillo-Guadalupe, to receive a dose of the Johnson & Johnson coronavirus disease (COVID-19) vaccine, during a binational vaccination program, in Ciudad Juarez, Mexico July 28, 2021. REUTERS/Jose Luis Gonzalez

Nicolas, 29, from Switzerland, jumps in front of the Tagus River, amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, July 28, 2021. REUTERS/Nacho Doce

A waiter wearing a face mask talks with a woman as she eats on an empty terrace of a restaurant at Augusta street, amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, July 28, 2021. REUTERS/Nacho Doce

Children are silhouetted as they ride a scooter and a skateboard during the sunset at a skate park on the seawall of Calais, France, July 28, 2021. REUTERS/Pascal Rossignol

U.S. President Joe Biden arrives on Marine One from travel on the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

People wait in line to receive the vaccine against the coronavirus disease (COVID-19) at a vaccination centre in Meloneras on the island of Gran Canaria, Spain, July 28, 2021. REUTERS/Borja Suarez

U.S. President Joe Biden returns a salute prior to departing Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

U.S. President Joe Biden is escorted by Col. Matthew Jones, commander of the 89th Airlift Wing, as he walks from Marine One prior to boarding Air Force One as he departs Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

U.S. President Joe Biden waves while boarding Air Force One as he departs Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

U.S. President Joe Biden salutes while boarding Air Force One as he departs Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

U.S. President Joe Biden boards Air Force One as he departs Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

U.S. President Joe Biden returns a salute after stepping off Marine One prior to departing Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

U.S. President Joe Biden waves while boarding Air Force One as he departs Washington for travel to Pennsylvania at Joint Base Andrews, Maryland, U.S., July 28, 2021. REUTERS/Evelyn Hockstein

Marine One carrying U.S. President Joe Biden departs the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

Marine One carrying U.S. President Joe Biden departs the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

Marine One carrying U.S. President Joe Biden departs the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden leaves the Oval Office to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden boards Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno

U.S. President Joe Biden walks out to board Marine One for travel to Lower Macungie Township, Pennsylvania from the South Lawn of the White House in Washington, D.C., U.S. July 28, 2021. REUTERS/Ken Cedeno