A Russian government plane with expelled Russian diplomats departs from the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. Picture taken May 29, 2021. REUTERS/David W Cerny 

A Russian government plane with expelled Russian diplomats departs from the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. Picture taken May 29, 2021. REUTERS/David W Cerny 

A Russian government plane with expelled Russian diplomats departs from the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. Picture taken May 29, 2021. REUTERS/David W Cerny 

Passengers board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers arrive to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers arrive to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers arrive to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers arrive to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers arrive to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

A passenger arrives to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Passengers arrive to board a Russian government plane with expelled Russian diplomats at the Vaclav Havel airport in Prague, Czech Republic, May 29, 2021. REUTERS/David W Cerny 

Czech Minister of Foreign Affairs Jan Hamacek arrives to welcome Czech diplomats expelled from Russia at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Czech diplomats expelled from Russia arrive at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Czech Minister of Foreign Affairs Jan Hamacek arrives to welcome Czech diplomats expelled from Russia at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Czech diplomats expelled from Russia arrive at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Czech diplomats expelled from Russia arrive at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Czech diplomats expelled from Russia arrive at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Czech diplomats expelled from Russia arrive at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

A plane carrying Czech diplomats expelled from Russia arrives at Vaclav Havel Airport in Prague, Czech Republic April 19, 2021. REUTERS/David W Cerny 

Members of the Urban Search and Rescue (USAR) team board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of the Urban Search and Rescue (USAR) team board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A dog is seen with members of the Urban Search and Rescue (USAR) team before they board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Dogs are seen with members of the Urban Search and Rescue (USAR) team before they board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Czech Interior Minister Jan Hamacek greets members of the Urban Search and Rescue (USAR) team before they board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Czech Interior Minister Jan Hamacek shakes hands with members of the Urban Search and Rescue (USAR) team before they board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Czech Interior Minister Jan Hamacek shakes hands with members of the Urban Search and Rescue (USAR) team before they board an airplane to Beirut, at the Vaclav Havel Airport in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of Urban Search and Rescue (USAR) team walk to board an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of Urban Search and Rescue (USAR) team walk to board an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of Urban Search and Rescue (USAR) team wait to board an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of Urban Search and Rescue (USAR) team leave a bus before boarding an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of Urban Search and Rescue (USAR) team leave a bus before boarding an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A man checks the health of a dog as members of Urban Search and Rescue (USAR) team wait to board an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A member of Urban Search and Rescue (USAR) team holds a dog before boarding an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A man checks the health of a dog as members of Urban Search and Rescue (USAR) team wait to board an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A member of Urban Search and Rescue (USAR) team waits to board an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A members of Urban Search and Rescue (USAR) team is seen before boarding an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

Members of Urban Search and Rescue (USAR) team are seen before boarding an airplane as they depart the Vaclav Havel Airport to Beirut in Prague, Czech Republic, August 5, 2020. REUTERS/David W Cerny 

A social distancing sign is seen on the floor at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

Hand sanitisers are seen at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A man walks by Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

Planes are seen parked on the tarmac at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

Smartwings airline planes are seen parked on the tarmac at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

Smartwings airline planes are seen parked on the tarmac at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

Smartwings airline planes are seen parked on the tarmac at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit carries a hand leader while working on disinfecting a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit disinfects a passenger plane of Smartwings airline at Vaclav Havel Airport due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

A worker in a protective suit walks near of a passenger plane of Smartwings airline at Vaclav Havel Airport as planes are disinfected due to the coronavirus disease (COVID-19) concerns in Prague, Czech Republic, May 21, 2020. REUTERS/David W Cerny 

Grounded Smartwings airline planes are seen parked at Vaclav Havel Airport amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 19, 2020. REUTERS/David W Cerny 

Grounded Smartwings airline planes are seen parked at Vaclav Havel Airport amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 19, 2020. REUTERS/David W Cerny 

Grounded Smartwings airline planes are seen parked at Vaclav Havel Airport amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, May 19, 2020. REUTERS/David W Cerny