Italy's Prime Minister Mario Draghi arrives for an EU summit at the Crystal Palace in Porto, Portugal May 8, 2021. Francisco Seco/Pool via REUTERS

Spain's Prime Minister Pedro Sanchez arrives at the Palacio de Cristal for an informal meeting in the framework of the European Social Summit in Porto, Portugal, May 8, 2021. REUTERS/Violeta Santos Moura/Pool

Italy's Prime Minister Mario Draghi arrives at the Palacio de Cristal for an informal meeting in the framework of the European Social Summit in Porto, Portugal, May 8, 2021. REUTERS/Violeta Santos Moura/Pool

President of the European Parliament David Sassoli arrives at the Palacio de Cristal for an informal meeting in the framework of the European Social Summit in Porto, Portugal, May 8, 2021. REUTERS/Violeta Santos Moura/Pool

The view shows the snow-covered Mount Pilatus and the medieval Kapellbruecke bridge behind a weekly market in Luzern, Switzerland May 8, 2021. REUTERS/Arnd Wiegmann

The view shows the snow-covered Mount Pilatus behind a weekly market in Luzern, Switzerland May 8, 2021. REUTERS/Arnd Wiegmann

Germany's Social Democratic Party (SPD) secretary general Lars Klingbeil and Sophie-Marie Heidenreich review the event location CityCube Berlin one day before a party meeting in Berlin, Germany, May 8, 2021. REUTERS/Annegret Hilse/Pool

The view shows the medieval Kapellbruecke bridge and the Wasserturm tower in front of the old town of Luzern, Switzerland May 8 , 2021. REUTERS/Arnd Wiegmann

The snow-covered Mount Pilatus is seen behind the medieval Kapellbruecke bridge and the Wasserturm tower in Luzern, Switzerland May 8, 2021. REUTERS/Arnd Wiegmann

Germany's Social Democratic Party (SPD) secretary general Lars Klingbeil addresses the media at the event location CityCube Berlin one day before a party meeting in Berlin, Germany, May 8, 2021. REUTERS/Annegret Hilse/Pool

Germany's Social Democratic Party (SPD) secretary general Lars Klingbeil addresses the media at the event location CityCube Berlin one day before a party meeting in Berlin, Germany, May 8, 2021. REUTERS/Annegret Hilse/Pool

The snow-covered Mount Pilatus is seen behind the medieval Kapellbruecke bridge and the Wasserturm tower in Luzern, Switzerland May 8, 2021. REUTERS/Arnd Wiegmann

Germany's Social Democratic Party (SPD) secretary general Lars Klingbeil poses at the event location CityCube Berlin one day before a party meeting in Berlin, Germany, May 8, 2021. REUTERS/Annegret Hilse/Pool

Germany's Social Democratic Party (SPD) secretary general Lars Klingbeil and Sophie-Marie Heidenreich review the event location CityCube Berlin one day before a party meeting in Berlin, Germany, May 8, 2021. REUTERS/Annegret Hilse/Pool

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 General view inside the Ariake Gymnastics centre REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Athletes waiting to perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Jury is seen as Japan's Women's College of Physical Education team perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Athletes wearing protective face masks are seen at the event opening ceremony REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

Olympics - Tokyo 2020 Olympic Games Test Event - Rhythmic Gymnastics - Ariake Gymnastics centre, Tokyo, Japan - May 8, 2021 Japan's team Fairy Japan Pola perform during the Rhythmic Gymnastics event REUTERS/Kim Kyung-Hoon REFILE - CORRECTING CAPTION

International Olympic Committee Vice President John Coates and Australian Olympic Committee Chief Executive Matt Carroll hold a news conference at Sydney harbour, Australia May 8, 2021. REUTERS/Nick Mulvenney

International Olympic Committee Vice President John Coates and Australian Olympic Committee Chief Executive Matt Carroll hold a news conference at Sydney harbour, Australia May 8, 2021. REUTERS/Nick Mulvenney

El Salvador's President Nayib Bukele attends a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele speaks during a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele speaks during a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters step off the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Commuters wait for the metro train, one of the busiest metro systems in the world, in Mexico City, Mexico May 7, 2021. REUTERS/Carlos Jasso

Demonstrators take part in a protest demanding government action to tackle poverty, police violence and inequalities in healthcare and education systems, in Bogota, Colombia, May 7, 2021. REUTERS/Luisa Gonzalez

Demonstrators take part in a protest demanding government action to tackle poverty, police violence and inequalities in healthcare and education systems, in Bogota, Colombia, May 7, 2021. REUTERS/Luisa Gonzalez

Demonstrators take part in a protest demanding government action to tackle poverty, police violence and inequalities in healthcare and education systems, in Bogota, Colombia, May 7, 2021. REUTERS/Luisa Gonzalez

El Salvador's President Nayib Bukele and Defence Minister Rene Francis Merino Monroy attend a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele arrives with Defence Minister Rene Francis Merino Monroy for a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele arrives with Defence Minister Rene Francis Merino Monroy for a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele arrives with Defence Minister Rene Francis Merino Monroy for a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele arrives with Defence Minister Rene Francis Merino Monroy for a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

El Salvador's President Nayib Bukele arrives with Defence Minister Rene Francis Merino Monroy for a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

Florida Congressman Matt Gaetz and Georgia Congresswoman Marjorie Taylor Greene attend "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones

Georgia Congresswoman Marjorie Taylor Greene is interviewed during "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones

Florida Congressman Matt Gaetz and Georgia Congresswoman Marjorie Taylor Greene attend "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones

Georgia Congresswoman Marjorie Taylor Greene gives a thumb up next to Florida Congressman Matt Gaetz during "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones

Florida Congressman Matt Gaetz and Georgia Congresswoman Marjorie Taylor Greene attend "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones TPX IMAGES OF THE DAY

Florida Congressman Matt Gaetz and Georgia Congresswoman Marjorie Taylor Greene attend "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones

Florida Congressman Matt Gaetz and Georgia Congresswoman Marjorie Taylor Greene attend "America First" rally in The Villages, Florida, U.S. May 7, 2021. REUTERS/Octavio Jones

Salvadoran army cadets participate in a military ceremony to commemorate the Salvadoran Soldier day in Antiguo Cuscatlan, El Salvador May 7, 2021. REUTERS/Jose Cabezas

People light candles during a march and a vigil in support of the victims of the metro train accident that left 24 people dead and injuring some 79 others in Mexico City, Mexico May 7, 2021. REUTERS/Edgard Garrido

A band performs music during a march and a vigil in support of the victims of the metro train accident that left 24 people dead and injuring some 79 others in Mexico City, Mexico May 7, 2021. REUTERS/Edgard Garrido

People attend a march and a vigil in support of the victims of the metro train accident that left 24 people dead and injuring some 79 others in Mexico City, Mexico May 7, 2021. REUTERS/Edgard Garrido

People attend a march and a vigil in support of the victims of the metro train accident that left 24 people dead and injuring some 79 others in Mexico City, Mexico May 7, 2021. REUTERS/Edgard Garrido

People attend a march and a vigil in support of the victims of the metro train accident that left 24 people dead and injuring some 79 others in Mexico City, Mexico May 7, 2021. REUTERS/Edgard Garrido