A member of the Queen's Guard is pictured outside Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 15, 2021. REUTERS/Tom Nicholson

An anaesthesiologist Kinga Szlachcic-Wyroba is seen inside the coronavirus disease (COVID-19) intensive care ward at the Stefan Zeromski hospital in Krakow, Poland, April 14, 2021. Picture taken April 14, 2021. REUTERS/Kacper Pempel

Medical staff member treats a patient inside the coronavirus disease (COVID-19) intensive care ward at the Stefan Zeromski hospital in Krakow, Poland, April 14, 2021. Picture taken April 14, 2021. REUTERS/Kacper Pempel

Medical staff member is seen inside the coronavirus disease (COVID-19) ward at the Stefan Zeromski hospital in Krakow, Poland, April 14, 2021. Picture taken April 14, 2021. REUTERS/Kacper Pempel

Medical staff member treats a patient inside the coronavirus disease (COVID-19) intensive care ward at the Stefan Zeromski hospital in Krakow, Poland, April 14, 2021. Picture taken April 14, 2021. REUTERS/Kacper Pempel

Medical staff member is seen inside the coronavirus disease (COVID-19) intensive care ward at the Stefan Zeromski hospital in Krakow, Poland, April 14, 2021. Picture taken April 14, 2021. REUTERS/Kacper Pempel

House Speaker Nancy Pelosi (D-CA) holds her weekly news conference with Capitol Hill reporters at the U.S. Capitol in Washington, U.S., April 15, 2021. REUTERS/Jonathan Ernst

House Speaker Nancy Pelosi (D-CA) holds her weekly news conference with Capitol Hill reporters at the U.S. Capitol in Washington, U.S., April 15, 2021. REUTERS/Jonathan Ernst

Soldiers in ceremonial dress walk on the grounds of Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Soldiers in ceremonial dress walk on the grounds of Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Soldiers in ceremonial dress walk on the grounds of Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Soldiers in ceremonial dress walk on the grounds of Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Labourers sit as they wait for Iftar (breaking fast) along a wholesale market during the holy fasting month of Ramadan as the outbreak of coronavirus disease (COVID-19) continues, in Karachi, Pakistan April 15, 2021. REUTERS/Akhtar Soomro

House Speaker Nancy Pelosi (D-CA) holds her weekly news conference with Capitol Hill reporters at the U.S. Capitol in Washington, U.S., April 15, 2021. REUTERS/Jonathan Ernst

Mohammad Said, 65, a private security guard, offers an evening prayer after Iftar (breaking fast) along a sidewalk in front of closed shops during the holy fasting month of Ramadan as the outbreak of coronavirus disease (COVID-19) continues, in Karachi, Pakistan April 15, 2021. REUTERS/Akhtar Soomro

Britain's Prince Charles leaves Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Hannah McKay

Representative Rick Crawford (R-AR) looks on during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Representative Markwayne Mullin (R-OK) speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Flags of the European Union and France flutter in front of the French Consulate in Karachi, Pakistan April 15, 2021. REUTERS/Akhtar Soomro

Representative Markwayne Mullin (R-OK) speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Representative Joaquin Castro (D-TX) wears a protective face mask as he speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Britain's Prince Charles leaves Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Hannah McKay

The German share price index DAX graph is pictured at the stock exchange in Frankfurt, Germany, April 15, 2021. REUTERS/Staff

Representative Eric Swalwell (D-CA) wears a protective face mask as he speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Russia's Andrey Rublev in action during his third round match against Spain's Roberto Bautista-Agut REUTERS/Eric Gaillard

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Spain's Roberto Bautista-Agut in action during his third round match against Russia's Andrey Rublev REUTERS/Eric Gaillard

Britain's Prince Charles leaves Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Hannah McKay

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Spain's Roberto Bautista-Agut in action during his third round match against Russia's Andrey Rublev REUTERS/Eric Gaillard

Representative Jackie Speier (D-CA) wears a protective face mask as she attends a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Russia's Andrey Rublev in action during his third round match against Spain's Roberto Bautista-Agut REUTERS/Eric Gaillard

DIA Director Lt. General Scott Berrier wears a protective face mask during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Russia's Andrey Rublev in action during his third round match against Spain's Roberto Bautista-Agut REUTERS/Eric Gaillard

Britain's Prince Charles leaves Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Hannah McKay

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Russia's Andrey Rublev in action during his third round match against Spain's Roberto Bautista-Agut REUTERS/Eric Gaillard

Representative Chris Stewart (R-UT) speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Le crédit à la consommation a augmenté en février de 27,6 milliards de dollars aux Etats-Unis.

Representative Brad Wenstrup (R-OH) speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Representative Andre Carson (D-IN) wears a protective face mask during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Representative Mike Turner (R-OH) speaks during a House Intelligence Committee hearing on worldwide threats, in Washington, D.C., U.S., April 15, 2021. Al Drago/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson observes the one minute of silence for Britain's Prince Philip as he attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of the late Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Soldiers in ceremonial dress leave Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Soldiers in ceremonial dress leave Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Soldiers in ceremonial dress leave Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 15, 2021. REUTERS/Phil Noble

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Director of National Intelligence Avril Haines looks on as she attends a House Intelligence Committee hearing on worldwide threats in Washington, D.C., U.S., April 15, 2021. Tasos Katopodis/Pool via REUTERS

A woman eats a sandwich as her beverage rests on a street post, amid the coronavirus disease (COVID-19) outbreak, in Barcelona, Spain April 15, 2021. REUTERS/Nacho Doce

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of Britain's Prince Philip, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Britain's Prime Minister Boris Johnson observes the one minute silence for Britain's Prince Philip as he attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of the late Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Spain's Rafael Nadal in action during his third round match against Bulgaria's Grigor Dimitrov REUTERS/Eric Gaillard

Tennis - ATP Masters 1000 - Monte Carlo Masters - Monte-Carlo Country Club, Roquebrune-Cap-Martin, France - April 15, 2021 Spain's Rafael Nadal walks off court after winning his third round match against Bulgaria's Grigor Dimitrov REUTERS/Eric Gaillard

Britain's Prime Minister Boris Johnson observes the one minute silence for Britain's Prince Philip as he attends Passing-out parade at Britannia Royal Naval College during his visit in commemoration of the late Duke of Edinburgh, in Dartmouth, Britain April 15, 2021. The Duke of Edinburgh was a cadet at the naval college when he first met Princess Elizabeth, who later became queen. Finnbarr Webster/Pool via REUTERS