German Economy Minister Peter Altmaier and State Secretary at the economy ministry Ulrich Nussbaum attend a news conference on the "rescue package" for German airline Lufthansa, in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

Travellers queue keeping social distance at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020.REUTERS/Amanda Perobelli

A traveller walks to the boarding section at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020.REUTERS/Amanda Perobelli

German Economy Minister Peter Altmaier and State Secretary at the economy ministry Ulrich Nussbaum arrive for a news conference on the "rescue package" for German airline Lufthansa, in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

A traveller walks as she carries her bags at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020.REUTERS/Amanda Perobelli

A traveller sits on bags near check-in desks at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020.REUTERS/Amanda Perobelli

An empty airline check-in hall is seen at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020.REUTERS/Amanda Perobelli

German Economy Minister Peter Altmaier briefs the media about the "rescue package" for German airline Lufthansa at the economy ministry in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

German Economy Minister Peter Altmaier leaves a news conference on the "rescue package" for German airline Lufthansa at the economy ministry in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

A airline employee organizes the check-in queue at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020.REUTERS/Amanda Perobelli

German Economy Minister Peter Altmaier briefs the media about the "rescue package" for German airline Lufthansa at the economy ministry in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

German Economy Minister Peter Altmaier arrives for a news conference on the "rescue package" for German airline Lufthansa at the economy ministry in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

German Economy Minister Peter Altmaier briefs the media about "rescue package" for German airline Lufthansa at the economy ministry in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

German Economy Minister Peter Altmaier briefs the media about "rescue package" for German airline Lufthansa at the economy ministry in Berlin, Germany May 25, 2020. Markus Schreiber/Pool via REUTERS

Thai Airways idle airplanes are seen parked on the tarmac of Suvarnabhumi Airport in Bangkok, Thailand May 25, 2020. REUTERS/Jorge Silva

Relatives lay flower and wreaths on the grave of Simon Eric, who was killed in a plane crash, at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

Relatives comfort each other as they mourn the death of Simon Eric, who was killed in a plane crash, during his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

Relatives react as they reach out to touch the coffin of Simon Eric, who was killed in a plane crash, during his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

Relatives react as they reach out to touch the coffin of Simon Eric, who was killed in a plane crash, during his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

Relatives comfort the mother of Simon Eric, who was killed in a plane crash, as they mourn on his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

A man holds a cross, inscribed with the name, dates of birth and death, as he leading the people carrying coffin of Simon Eric, who was killed in a plane crash, during his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

Relatives comfort each other as they mourn the death of Simon Eric, who was killed in a plane crash, during his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro

Relatives comfort each other as they mourn the death of Simon Eric, who was killed in a plane crash, during his burial at the Christian's Gora Cemetery in Karachi, Pakistan May 25, 2020. REUTERS/Akhtar Soomro TPX IMAGES OF THE DAY

Malaysian shipping employees wait in a queue to enter Chhatrapati Shivaji International Airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Mumbai, India, May 25, 2020. REUTERS/Francis Mascarenhas

Passengers wearing protective face masks wait in a queue to enter Chhatrapati Shivaji International Airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Mumbai, India, May 25, 2020. REUTERS/Francis Mascarenhas

Passengers wearing protective face masks wait in a queue to enter Chhatrapati Shivaji International Airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Mumbai, India, May 25, 2020. REUTERS/Francis Mascarenhas

An airport staff member pushes trollies at the entrance of Chhatrapati Shivaji International Airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Mumbai, India, May 25, 2020. REUTERS/Francis Mascarenhas

Passengers wearing personal protective equipment (PPE) enter Chhatrapati Shivaji International Airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Mumbai, India, May 25, 2020. REUTERS/Francis Mascarenhas

Passengers wear personal protective equipment (PPE) as they stand in a queue to enter Chhatrapati Shivaji International Airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in Mumbai, India, May 25, 2020. REUTERS/Francis Mascarenhas

A passenger wearing personal protective equipment (PPE) puts his luggage on a sanitation belt at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A person wearing personal protective equipment (PPE) carries luggage at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A person wearing personal protective equipment (PPE) carries luggage at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A man wearing a protection mask and gloves holds a sign at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A child wearing a protection mask and gloves is seen at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A passenger wearing gloves is pictured at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A member of the Central Industrial Security Force (CISF) talks with a passenger through a glass shield, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), at Indira Gandhi International (IGI) airport, in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi TPX IMAGES OF THE DAY

Passengers wearing face masks maintain social distance at Indira Gandhi International (IGI) airport, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

A member of the Central Industrial Security Force (CISF) checks the ID of a passenger through a glass shield, after the government allowed domestic flight services to resume, during an extended nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), at Indira Gandhi International (IGI) airport, in New Delhi, India, May 25, 2020. REUTERS/Adnan Abidi

Rose Casey, with her partner Rob Tough, walks toward the hearse carrying the casket of her daughter Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during the homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Rose Casey, with her partner Rob Tough, watches as pallbearers load the flag-draped casket of her daughter Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during the homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Rose Casey watches with family and friends as pallbearers load the flag-draped casket of her daughter Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during the homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese TPX IMAGES OF THE DAY

Canada's Defence Minister Harjit Sajjan and Governor General Julie Payette attend the homecoming ceremony of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

A mourner holds a Canadian flag while lining the route for the motorcade procession of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, in Halifax, NovaScotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Mourners hold a Canadian flag along the highway as the hearse carrying Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, is lead by motorcade in Halifax, NovaScotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Mourners are silhouetted lining the route for the motorcade procession of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, in Halifax, NovaScotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Pallbearers carry the flag-draped casket of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, as friends and family attend the homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

A padre leads pallbearers carrying the flag-draped casket of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during a homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Family and friends watch as pallbearers load the flag-draped casket of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during the homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Pallbearers carry the flag-draped casket of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during a homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Pallbearers carry the flag-draped casket of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during a homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Pallbearers carry the flag-draped casket of Captain Jennifer Casey, who was killed in the crash of a Royal Canadian Air Force Snowbirds exhibition team aircraft, during a homecoming ceremony in Halifax, Nova Scotia, Canada May 24, 2020. REUTERS/Darren Calabrese

Vietnam Airlines's cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai attend their wedding ceremony after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which pushed back the original wedding date, in Hanoi, Vietnam May 23, 2020. Picture taken May 23, 2020. REUTERS/Kham

Vietnam Airlines' cabin attendant Tran Le Duyen waits for as her groom, aviation sector businessman Nguyen Van Trai to come up the stairs during their wedding ceremony after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which delayed their original wedding date, in Hanoi, Vietnam May 23, 2020. Picture taken May 23, 2020. REUTERS/Kham

Relatives attend the wedding party of Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which pushed back the original wedding date, in Hanoi, Vietnam May 22, 2020. Picture taken May 22, 2020. REUTERS/Kham

Relatives attend the wedding party of Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which pushed back the original wedding date, in Hanoi, Vietnam May 22, 2020. Picture taken May 22, 2020. REUTERS/Kham

Relatives attend the wedding party of Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which pushed back the original wedding date, in Hanoi, Vietnam May 22, 2020. Picture taken May 22, 2020. REUTERS/Kham

Relatives drink during the wedding party of Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which pushed back the original wedding date, in Hanoi, Vietnam May 22, 2020. Picture taken May 22, 2020. REUTERS/Kham

Relatives attend the wedding party of Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which pushed back the original wedding date, in Hanoi, Vietnam May 23, 2020. Picture taken May 23, 2020. REUTERS/Kham

Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai react with their parents during the wedding ceremony after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which delayed their original wedding date, in Hanoi, Vietnam May 23, 2020. Picture taken May 23, 2020. REUTERS/Kham

Vietnam Airlines' cabin attendant Tran Le Duyen and aviation sector businessman Nguyen Van Trai kiss during their wedding ceremony after the Vietnamese government eased the nationwide lockdown for the coronavirus disease (COVID-19) outbreak, which delayed their original wedding date, in Hanoi, Vietnam May 23, 2020. Picture taken May 23, 2020. REUTERS/Kham