A French farmer drives a combine as he harvests wheat in his field by night in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

A field of wheat is seen in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Wheat pours into a trailer as a French farmer harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Wheat pours into a trailer as a French farmer harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

A French farmer checks his newly-harvested wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Wheat pours into a trailer as a French farmer harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

A French farmer drives a combine as he harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Wheat pours into a trailer as a French farmer harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Ears of wheat are seen in a wheat field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

A French farmer drives a combine as he harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Ears of wheat are seen in a wheat field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

A French farmer drives a combine as he harvests wheat in his field in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

A French farmer drives a combine as he harvests wheat in his field by night in Chateau-Thebaud, France, July 9, 2020. REUTERS/Stephane Mahe

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki and Czech Republic's Prime Minister Andrej Babis attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Poland's Prime Minister Mateusz Morawiecki and Czech Republic's Prime Minister Andrej Babis attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban attends a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban attends a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban attend a news conference at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban looks up as he wears a face mask at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Czech Republic's Prime Minister Andrej Babis wearing a face mask gives his signature, next to Hungary's Prime Minister Viktor Orban, at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Poland's Prime Minister Mateusz Morawiecki is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Czech Republic's Prime Minister Andrej Babis wears a face mask as he waits to welcome his counterparts of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Poland's Prime Minister Mateusz Morawiecki is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic and Poland's Prime Minister Mateusz Morawiecki wear face masks as they attend a family photo opportunity at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Poland's Prime Minister Mateusz Morawiecki is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban wear face masks as they attend a family photo opportunity at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Poland's Prime Minister Mateusz Morawiecki and Czech Republic's Prime Minister Andrej Babis wear face masks as they pose for a family photo at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic, Poland's Prime Minister Mateusz Morawiecki, Czech Republic's Prime Minister Andrej Babis and Hungary's Prime Minister Viktor Orban pose for a family photo at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Hungary's Prime Minister Viktor Orban is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Hungary's Prime Minister Viktor Orban is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

Slovakia's Prime Minister Igor Matovic is welcomed by Czech Republic's Prime Minister Andrej Babis as he arrives at the summit of the Visegrad Group (V4) countries at Lednice Chateau, following the coronavirus disease (COVID-19) outbreak, in the village of Lednice, Czech Republic, June 11, 2020. REUTERS/David W Cerny

The Chateau de Versailles (Versailles palace) is seen on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

The Latona’s fountain at the Chateau de Versailles (Versailles palace) is seen on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors look at the Latona’s fountain at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors look at the Latona’s fountain at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Empty chairs and tables of cafes and restaurants are pictured around the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors look at the Latona’s fountain at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors walk around the Apollon Pond, a fountain at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors walk in the Cour d’honneur courtyard at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

The Chateau de Versailles (Versailles palace) is seen on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors stand in the Cour d’honneur courtyard at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

French soldiers patrol in the Cour d’honneur courtyard at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors stand in the Cour d’honneur courtyard at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors wearing protective face masks visit the Hall of Mirrors (Galerie des Glaces) at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors wearing protective face masks visit the Hall of Mirrors (Galerie des Glaces) at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors wearing protective face masks visit the Hall of Mirrors (Galerie des Glaces) at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors wearing protective face masks visit the Hall of Mirrors (Galerie des Glaces) at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Visitors wearing protective face masks visit the Hall of Mirrors (Galerie des Glaces) at the Chateau de Versailles (Versailles palace) on its reopening day in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 6, 2020. REUTERS/Charles Platiau

Gardeners work on the gardens of the of the Chateau de Versailles (Versailles palace) on the eve of its reopening with health and safety measures for visitors and staff in Versailles, near Paris, following the outbreak of the coronavirus disease (COVID-19) in France, June 5, 2020. REUTERS/Gonzalo Fuentes