Prefect of the Paris Police Didier Lallement attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

Prefect of the Paris Police Didier Lallement attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

Prefect of the Paris Police Didier Lallement attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

Prefect of the Paris Police Didier Lallement attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

Prefect of the Paris Police Didier Lallement attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe, Senate President Gerard Larcher, Mayor of Paris Anne Hidalgo and French National Assembly President Richard Ferrand attend a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe and Senate President Gerard Larcher attend a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe and Senate President Gerard Larcher attend a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

Mayor of Paris Anne Hidalgo attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French National Assembly President Richard Ferrand attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French National Assembly President Richard Ferrand attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

French Prime Minister Edouard Philippe attends a ceremony at the Luxembourg Gardens to mark the anniversary of the abolition of slavery and to pay tribute to the victims of the slave trade, in Paris, France May 10, 2020. Ian Langsdon/Pool via REUTERS

A view of a construction site that has stopped work in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

Workers wearing face masks work at a construction site in Luxembourg, following an outbreak of the coronavirus disease (COVID-19), Luxembourg April 20, 2020. REUTERS/Johanna Geron

A worker wearing a protective mask is seen at an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

Workers wearing face masks work at a construction site in Luxembourg, following an outbreak of the coronavirus disease (COVID-19), Luxembourg April 20, 2020. REUTERS/Johanna Geron

Workers wearing face masks work at a construction site in Luxembourg, following an outbreak of the coronavirus disease (COVID-19), Luxembourg April 20, 2020. REUTERS/Johanna Geron

A plastic bag is placed between urinals in order for workers to distance themselves at a construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

Workers wearing face masks work at a construction site in Luxembourg, following an outbreak of the coronavirus disease (COVID-19), Luxembourg April 20, 2020. REUTERS/Johanna Geron

A lone worker is seen at an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

A worker is seen at an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

Workers wearing face masks work at a construction site in Luxembourg, following an outbreak of the coronavirus disease (COVID-19), Luxembourg April 20, 2020. REUTERS/Johanna Geron

View of an almost deserted construction site in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

Workers wearing face masks work at a construction site in Luxembourg, following an outbreak of the coronavirus disease (COVID-19), Luxembourg April 20, 2020. REUTERS/Johanna Geron

Cranes are seen above closed construction sites near the Atomium monument in Brussels during the lockdown imposed by the Belgian government to slow down the coronavirus disease (COVID-19) spread, in Brussels, Belgium April 20, 2020. Picture taken April 20, 2020. REUTERS/Francois Lenoir

People wear protective masks as they wait to cross the street during the coronavirus disease (COVID-19) outbreak in central station of Luxembourg, in Luxembourg, April 20, 2020. Reuters/Johanna Geron

People wear protective masks as they cross the street during the coronavirus disease (COVID-19) outbreak in central station of Luxembourg, in Luxembourg, April 20, 2020. Reuters/ Johanna Geron

People wear protective masks as they walk during the coronavirus disease (COVID-19) outbreak in central station of Luxembourg, in Luxembourg, April 20, 2020. Reuters/ Johanna Geron

Women wear protective masks as they walk during the coronavirus disease (COVID-19) outbreak in central station of Luxembourg, in Luxembourg, April 20, 2020. Reuters/ Johanna Geron

People wear protective masks as they walk during the coronavirus disease (COVID-19) outbreak in central station of Luxembourg, in Luxembourg, April 20, 2020. Reuters/Johanna Geron

A woman wears a protective face mask during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A man wears a protective face mask during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A couple wear protective face masks during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A man wears a protective face mask during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

Women wear protective face masks during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A man wears a protective face mask during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A man wears a protective face mask during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A woman wears a protective face mask during the coronavirus disease (COVID-19) outbreak, in central station of Luxembourg, Luxembourg, April 20, 2020. REUTERS/ Johanna Geron

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they wait to board their flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they wait to board their flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they wait to board their flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

An unaccompanied girl from Afghanistan who will be transferred to Luxembourg, wears a protective face mask as a precaution against the spread of coronavirus disease (COVID-19) as she checks-in her flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they wait to board their flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they board their flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they board their flight at the Athens International Airport, Greece, April 15, 2020. Orestis Panagiotou/Pool via REUTERS

A group of unaccompanied children from overcrowded migrant camps who will be transferred to Germany and Luxembourg, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they arrive at the port of Piraeus, Greece, April 15, 2020. REUTERS/Costas Baltas

An unaccompanied child from an overcrowded migrant camp who will be transferred to either Germany or Luxembourg, wears a protective face mask as a precaution against the spread of coronavirus disease (COVID-19) as he boards a bus at the port of Piraeus, Greece, April 15, 2020. REUTERS/Costas Baltas TPX IMAGES OF THE DAY