Mourners gather outside Windsor Castle after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

Mourners take a picture outside Windsor Castle after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Thyme Hill ridden by Tom O'Brien and Roksana ridden by Harry Skelton in action during the Ryanair Stayers Hurdle Pool via REUTERS/Peter Powell

Soccer Football - Ligue 1 - RC Strasbourg v Paris St Germain - Stade de la Meinau, Strasbourg, France - April 10, 2021 Paris St Germain's Kylian Mbappe before the match REUTERS/Christian Hartmann

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Thyme Hill ridden by Tom O'Brien in action before winning the Ryanair Stayers Hurdle Pool via REUTERS/Scott Heppell

A poll worker sets up voting tables, the day ahead of the first round of Presidential and Parliamentary elections, in Lima, Peru, April 10, 2021. REUTERS/Sebastian Castaneda

A poll worker carries unassembled voting tables, the day ahead of the first round of Presidential and Parliamentary elections, in Lima, Peru, April 10, 2021. REUTERS/Sebastian Castaneda

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 General view during the Ryanair Stayers Hurdle Pool via REUTERS/Scott Heppell

A Hindu priest performs evening prayer during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 10, 2021. REUTERS/Danish Siddiqui

Devotees gather for an evening prayer on the banks of Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 10, 2021. REUTERS/Danish Siddiqui

A devotee applies tika on his forehead after taking a dip in the Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 10, 2021. REUTERS/Danish Siddiqui

A devotee attends an evening prayer on the banks of Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 10, 2021. REUTERS/Danish Siddiqui

Devotees gather for an evening prayer on the banks of Ganges river during Kumbh Mela, or the Pitcher Festival, amidst the spread of the coronavirus disease (COVID-19), in Haridwar, India, April 10, 2021. REUTERS/Danish Siddiqui

Soccer Football - Ligue 1 - RC Strasbourg v Paris St Germain - Stade de la Meinau, Strasbourg, France - April 10, 2021 Paris St Germain's Kylian Mbappe before the match REUTERS/Christian Hartmann

A worker distributes electoral material ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Ash covers roads a day after the La Soufriere volcano erupted after decades of inactivity, in Kingstown, St Vincent and the Grenadines April 10, 2021. REUTERS/Robertson S. Henry

AFD member Joana Cotar, top candidate for the upcoming general elections, speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

AFD member Joana Cotar, top candidate for the upcoming general elections, speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

AFD member Joana Cotar, top candidate for the upcoming general elections, speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

Cartridges of artillery shells are seen before members of the Royal Gibraltar Regiment fire a 41-gun salute to mark the death of Britain's Prince Philip, the Duke of Edinburgh, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

A portrait of Britain's Prince Philip, the Duke of Edinburgh is seen inside The Convent to mark his death, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

Members of the Royal Gibraltar Regiment listen instructions before they fire a 41-gun salute to mark the death of Britain's Prince Philip, the Duke of Edinburgh, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

Members of the Royal Gibraltar Regiment march before they fire a 41-gun salute to mark the death of Britain's Prince Philip, the Duke of Edinburgh, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

Ash covers roads a day after the La Soufriere volcano erupted after decades of inactivity, in Kingstown, St Vincent and the Grenadines April 10, 2021. REUTERS/Robertson S. Henry

Soldiers check electoral material, to be distributed ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Soldiers unload electoral material to be distributed ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Soldiers unload electoral material to be distributed ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Soldiers unload electoral material to be distributed ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Soldiers unload electoral material to be distributed ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Soldiers unload electoral material to be distributed ahead of the second round of presidential elections, in Quito, Ecuador, April 10, 2021. REUTERS/Luisa Gonzalez

Members of the Royal Gibraltar Regiment march before they fire a 41-gun salute to mark the death of Britain's Prince Philip, the Duke of Edinburgh, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

Members of the Royal Gibraltar Regiment fire a 41-gun salute to mark the death of Britain's Prince Philip, the Duke of Edinburgh, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

Members of the Royal Gibraltar Regiment fire a 41-gun salute to mark the death of Britain's Prince Philip, the Duke of Edinburgh, in Gibraltar April 10, 2021. REUTERS/Jon Nazca

AFD member Alice Weidel speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

AFD member Alice Weidel speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

AFD member Alice Weidel speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

AFD member Alice Weidel speaks to media as she attends a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

A box of tea with a picture of the Royal Family on it is displayed in a souvenir shop window, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Peter Nicholls

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Horse trainer Paul Nicholls speaks on the phone Pool via REUTERS/Peter Powell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 General view of owners in front of an empty stand Pool via REUTERS/Peter Powell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Jockey Nico de Boinville celebrates winning the Doom Bar Maghull Novices' Chase riding Shishkin Pool via REUTERS/Peter Powell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Jockey Nico de Boinville celebrates winning the Doom Bar Maghull Novices' Chase riding Shishkin Pool via REUTERS/Peter Powell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Shishkin ridden by Nico de Boinville and Gumball ridden by Tom O'Brien in action during the Doom Bar Maghull Novices' Chase Pool via REUTERS/Scott Heppell

Police officers are seen at St George?s Chapel in Windsor Castle, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Peter Nicholls

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Shishkin ridden by Nico de Boinville wins the Doom Bar Maghull Novices' Chase Pool via REUTERS/Peter Powell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Shishkin ridden by Nico de Boinville in action during the Doom Bar Maghull Novices' Chase Pool via REUTERS/Scott Heppell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 Shishkin ridden by Nico de Boinville in action during the Doom Bar Maghull Novices' Chase Pool via REUTERS/Scott Heppell

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. Picture taken with a drone. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. Picture taken with a drone. REUTERS/Marko Djurica

People attend a protest against lack of government action to prevent investors from polluting rivers, land and air in front of the Serbian parliament in Belgrade, Serbia, April 10, 2021. REUTERS/Marko Djurica