Unused sunbeds are seen piled on each other on the sandy beach at Ghadira Bay in Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

Unused sunbeds are seen piled on each other on the sandy beach at Ghadira Bay in Mellieha, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi

Unused furnitures and TXL signs are seen during the media tour at the former Berlin Tegel airport during the last day before the end of operation in Berlin, Germany, May 4, 2021. REUTERS/Michele Tantussi

Unused furnitures are seen during the media tour at the former Berlin Tegel airport during the last day before the end of operation in Berlin, Germany, May 4, 2021. REUTERS/Michele Tantussi

Unused furnitures and TXL signs are pictured during the media tour at the former Berlin Tegel airport during the last day before the end of operation in Berlin, Germany, May 4, 2021. REUTERS/Michele Tantussi

Unused furnitures are seen during the media tour at the former Berlin Tegel airport during the last day before the end of operation in Berlin, Germany, May 4, 2021. REUTERS/Michele Tantussi

A paramedic holds a pack of used and unused vials of Russia's Sputnik V coronavirus disease (COVID-19) vaccine at a private hospital in Karachi, Pakistan April 4, 2021. REUTERS/Akhtar Soomro

A bar with unused chairs and tables is pictured in the red zone town of Frosinone, as tighter restrictions have been introduced after an increase in coronavirus disease (COVID-19) infections, in Frosinone, central Italy, March 11, 2021. REUTERS/Yara Nardi

A view shows the entrance to the coronavirus disease (COVID-19) vaccination center at unused Tegel Airport in Berlin, Germany, December 26, 2020. REUTERS/Michele Tantussi

A banner is placed the entrance to the coronavirus disease (COVID-19) vaccination center at unused Tegel Airport in Berlin, Germany, December 26, 2020. REUTERS/Michele Tantussi

A view shows the entrance to the coronavirus disease (COVID-19) vaccination center at unused Tegel Airport in Berlin, Germany, December 26, 2020. REUTERS/Michele Tantussi

A view shows the entrance to the coronavirus disease (COVID-19) vaccination center at unused Tegel Airport in Berlin, Germany, December 26, 2020. REUTERS/Michele Tantussi

A view shows the entrance to the coronavirus disease (COVID-19) vaccination center at unused Tegel Airport in Berlin, Germany, December 26, 2020. REUTERS/Michele Tantussi

Unused check-in kiosks are seen inside a mostly empty domestic terminal at Sydney Airport after surrounding states shut their borders to New South Wales in response to an outbreak of the coronavirus disease (COVID-19) in Sydney, Australia, December 21, 2020. REUTERS/Loren Elliott

Unused check-in kiosks are seen inside a mostly empty domestic terminal at Sydney Airport after surrounding states shut their borders to New South Wales in response to an outbreak of the coronavirus disease (COVID-19) in Sydney, Australia, December 21, 2020. REUTERS/Loren Elliott

Steps on the empty and unused stands are overgrown with foliage during the GAA Galway Senior Football Championship quarter final between Corofin and Salthill-Knocknacarra, following the government restrictions on the attendance of fans amid the coronavirus disease (COVID-19) pandemic, in Galway, Ireland, September 12, 2020. Picture taken September 12, 2020. REUTERS/Clodagh Kilcoyne

A Tesla electric charging point stands unused in a car park, as Britain will ban the sale of new petrol and diesel cars and vans from 2030, five years earlier than previously planned, in London, Britain, November 18, 2020. REUTERS/Simon Dawson

The election official Pam Hainault works in the ballot room organizing unused ballots returned from voting precincts after Election Day at the Kenosha Municipal Building in Kenosha, Wisconsin, U.S. November 4, 2020. REUTERS/Daniel Acker

Unused privacy booths are seen at a voting site in Tripp Commons inside the Memorial Union building on the University of Wisconsin-Madison campus on Election Day in Madison, Dane County, Wisconsin, U.S. November 3, 2020. REUTERS/Bing Guan

Homemade "Black Lives Matter" shields flank a display of an apparently new gas mask, new construction helmets still in their plastic bags, knee pads with their sales tags still on them, unused wooden sticks and new megaphones in the Kenosha law enforcement command center as U.S. President Donald Trump attends a roundtable discussion on "Wisconsin Community Safety" after the president surveyed property damage in the aftermath of recent protests against police brutality and racial injustice and the ensuing violence after the shooting of Jacob Blake by a police officer in Kenosha, Wisconsin, U.S., September 1, 2020. REUTERS/Leah Millis

An apparently new gas mask sits as part of a display with new construction helmets still in their plastic bags, knee pads with their sales tags still on them, unused wooden sticks and new megaphones next to homemade "Black Lives Matter" shields in the Kenosha law enforcement command center as U.S. President Donald Trump attends a roundtable discussion on "Wisconsin Community Safety" after the president surveyed property damage in the aftermath of recent protests against police brutality and racial injustice and the ensuing violence after the shooting of Jacob Blake by a police officer in Kenosha, Wisconsin, U.S., September 1, 2020. REUTERS/Leah Millis

New construction helmets still in their plastic bags, knee pads with their sales tags still on them, unused wooden sticks and new megaphones sit on display next to homemade "Black Lives Matter" shields in the Kenosha law enforcement command center as U.S. President Donald Trump attends a roundtable discussion on "Wisconsin Community Safety" after the president surveyed property damage in the aftermath of recent protests against police brutality and racial injustice and the ensuing violence after the shooting of Jacob Blake by a police officer in Kenosha, Wisconsin, U.S., September 1, 2020. REUTERS/Leah Millis

A pedestrian jogs beside an unused barricade outside of the Bethune Memorial Statue at Lincoln Park following a series of racial inequality protests, in Washington, U.S., July 7, 2020. REUTERS/Tom Brenner

Children play alongside an unused barricade beside the Bethune Memorial statue at Lincoln Park, following a series of racial inequality protests in Washington, U.S., July 7, 2020. REUTERS/Tom Brenner

A general view of unused agricultural machinery, including tractors, is seen as the spread of the coronavirus disease (COVID-19) continues in this aerial photo taken over Holtville, California, U.S., May 29, 2020. Picture taken with a drone. REUTERS/Bing Guan

The employee entrance of a Hyatt hotel is unused while the hotel is completely closed to guests during the coronavirus disease (COVID-19) outbreak, in Washington, U.S. May 8, 2020. New unemployment data shows the U.S. economy lost a staggering 20.5 million jobs in April. REUTERS/Jonathan Ernst

With no protesters to corral, barricades sit unused in front of the U.S. Supreme Court building during the coronavirus disease (COVID-19) outbreak, in Washington, U.S. May 8, 2020. REUTERS/Jonathan Ernst

With no protesters to corral, barricades sit unused in front of the U.S. Supreme Court building during the coronavirus disease (COVID-19) outbreak, in Washington, U.S. May 8, 2020. REUTERS/Jonathan Ernst

Frozen food unused by airlines is moved in storage at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is moved in storage at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is loaded onto a van at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is loaded onto a van at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is seen in storage at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is seen in storage at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is seen in storage at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Frozen food unused by airlines is seen in storage at Lineage Logistics in Heywood, The food is to be given to vulnerable local residents by Open Kitchen MCR, following the outbreak of the coronavirus disease (COVID-19), Heywood, Britain, April 29, 2020. REUTERS/Molly Darlington

Unused idle buses are seen parked along the Hudson River with the Midtown Manhattan skyline of New York City behind during the outbreak of the coronavirus disease (COVID-19) in Weehawken, New Jersey, U.S., April 28, 2020. REUTERS/Mike Segar

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

Staff at Open Kitchen MCR prepare food unused by airlines, to give to vulnerable local residents, following the outbreak of the coronavirus disease (COVID-19), Manchester, Britain, April 26, 2020. REUTERS/Molly Darlington

A combination picture shows the controlled demolition of an unused building, built in the 1980s to house several print publications in Sofia, Bulgaria, April 26, 2020. REUTERS/Stoyan Nenov

A general view shows the controlled demolition of an unused building, built in the 1980s to house several print publications, in Sofia, Bulgaria, April 26, 2020. REUTERS/Stoyan Nenov

A general view shows the controlled demolition of an unused building, built in the 1980s to house several print publications, in Sofia, Bulgaria, April 26, 2020. REUTERS/Stoyan Nenov

A general view shows the controlled demolition of an unused building, built in the 1980s to house several print publications, in Sofia, Bulgaria, April 26, 2020. REUTERS/Stoyan Nenov

A general view shows the controlled demolition of an unused building, built in the 1980s to house several print publications, in Sofia, Bulgaria, April 26, 2020. REUTERS/Stoyan Nenov

A general view shows the controlled demolition of an unused building, built in the 1980s to house several print publications, in Sofia, Bulgaria, April 26, 2020. REUTERS/Stoyan Nenov