Military Emergency Unit members travel on a moving walkway at Madrid's Adolfo Suarez Barajas Airport during disinfection and a partial lockdown as part of a 15-day state of emergency to combat the coronavirus disease (COVID-19) outbreak in Madrid, Spain March 19, 2020. REUTERS/Sergio Perez 

Military Emergency Unit members disinfect a moving walkway at Madrid's Adolfo Suarez Barajas Airport during a partial lockdown as part of a 15-day state of emergency to combat the coronavirus disease (COVID-19) outbreak in Madrid, Spain March 19, 2020. REUTERS/Sergio Perez TPX IMAGES OF THE DAY 

A traveler wearing a protective face mask pushes her luggage as Military Emergency Unit members disinfect a moving walkway at Madrid's Adolfo Suarez Barajas Airport during a partial lockdown, as part of a 15-day state of emergency to combat the coronavirus disease (COVID-19) outbreak in Madrid, Spain March 19, 2020. REUTERS/Sergio Perez 

Military Emergency Unit members disinfect a moving walkway at Madrid's Adolfo Suarez Barajas Airport during a partial lockdown as part of a 15-day state of emergency to combat the coronavirus disease (COVID-19) outbreak in Madrid, Spain March 19, 2020. REUTERS/Sergio Perez 

A Military Emergency Unit member disinfects a moving walkway at Madrid's Adolfo Suarez Barajas Airport during a partial lockdown as part of a 15-day state of emergency to combat the coronavirus disease (COVID-19) outbreak in Madrid, Spain March 19, 2020. REUTERS/Sergio Perez 

Military Emergency Unit members disinfect a moving walkway at Madrid's Adolfo Suarez Barajas Airport during a partial lockdown as part of a 15-day state of emergency to combat the coronavirus disease (COVID-19) outbreak in Madrid, Spain March 19, 2020. REUTERS/Sergio Perez 

A worker wearing protective suit sprays disinfectant on a moving walkway at the international arrivals terminal of Soekarno-Hatta Airport near Jakarta, amid the coronavirus disease (COVID-19) outbreak, Indonesia, March 13, 2020. REUTERS/Willy Kurniawan 

A worker wearing protective suit sprays disinfectant on a moving walkway at the international arrivals terminal of Soekarno-Hatta Airport near Jakarta, amid the coronavirus disease (COVID-19) outbreak, Indonesia, March 13, 2020. REUTERS/Willy Kurniawan 

A worker sprays disinfectant on a moving walkway at international arrivals terminal of Soekarno-Hatta Airport near Jakarta, amid the coronavirus disease (COVID-19), Indonesia March 13, 2020. REUTERS/Willy Kurniawan 

A worker sprays disinfectant on a moving walkway at international terminal of Soekarno-Hatta Airport near Jakarta, amid the coronavirus disease (COVID-19), Indonesia March 13, 2020. REUTERS/Willy Kurniawan 

Passenger wearing protective mask stands on a moving walkway at the arrivals terminal of Soekarno-Hatta International Airport, amid the coronavirus disease (COVID-19) outbreak in Tangerang near Jakarta, Indonesia, March 12, 2020. REUTERS/Willy Kurniawan 

Passengers wearing face masks stand on a moving walkway at Beijing Capital International Airport as the country is hit by an outbreak of the novel coronavirus, China, March 9, 2020. REUTERS/Thomas Peter 

Passengers wearing face masks stand on a moving walkway at Beijing Capital International Airport as the country is hit by an outbreak of the novel coronavirus, China, March 9, 2020. REUTERS/Thomas Peter 

A member of the ground staff wearing a face mask walks on a moving walkway at Beijing Capital International Airport as the country is hit by an outbreak of the novel coronavirus, China, March 9, 2020. REUTERS/Thomas Peter 

A Secret Service agent moves pedestrians back on a sidewalk as they try to view U.S. Democratic presidential nominee Hillary Clinton as she leaves a field office for U.S. Representative Debbie Wasserman Schultz in Davie, Florida, U.S., August 9, 2016. REUTERS/Chris Keane 

Stuffed toys are attached to a music gazebo as flowers and candles left in tribute at makeshift memorials to the victims of the truck attack are moved along the Promenade des Anglais in Nice, France, July 18, 2016. REUTERS/Jean-Pierre Amet

A tourist from Scotland walks with her camera on a street in Havana, September 18, 2015. Even as the U.S. moved on Friday to ease travel and other restrictions to Cuba, Americans will still not be allowed to go to the Communist nation for "tourist activities," a U.S. official said. Speaking to reporters, senior Obama administration officials said such travel remains prohibited even as the regulations expand to allow family members to travel alongside authorized travelers for a wider variety of activities. REUTERS/Edgard Garrido 

A second-storey walkway to apartment units is shown after it collapsed during heavy rains in Long Beach, California, December 12, 2014. A major storm that pummeled northern California and the Pacific Northwest with heavy rain and high winds and killed two people moved south overnight, prompting evacuation orders in areas prone to floods and mud flows. The National Weather Service forecast the system to track through southwestern California late on Thursday and into Friday, bringing the possibility of strong thunderstorms, as well as waterspouts and small tornadoes along the coast. REUTERS/Bob Riha Jr. (UNITED STATES - Tags: DISASTER ENVIRONMENT) 

A second-story walkway to apartment units is shown after it collapsed during heavy rains in Long Beach, California, December 12, 2014. A major storm that pummeled northern California and the Pacific Northwest with heavy rain and high winds and killed two people moved south overnight, prompting evacuation orders in areas prone to floods and mud flows. The National Weather Service forecast the system to track through southwestern California late on Thursday and into Friday, bringing the possibility of strong thunderstorms, as well as waterspouts and small tornadoes along the coast. REUTERS/Bob Riha Jr. (UNITED STATES - Tags: DISASTER ENVIRONMENT SOCIETY) 

A second-story walkway to apartment units is shown after it collapsed during heavy rains in Long Beach, California, December 12, 2014. A major storm that pummeled northern California and the Pacific Northwest with heavy rain and high winds and killed two people moved south overnight, prompting evacuation orders in areas prone to floods and mud flows. The National Weather Service forecast the system to track through southwestern California late on Thursday and into Friday, bringing the possibility of strong thunderstorms, as well as waterspouts and small tornadoes along the coast. REUTERS/Bob Riha Jr. (UNITED STATES - Tags: DISASTER ENVIRONMENT SOCIETY) 

A fan of Switzerland's soccer team stands on a travelator at Brasilia Airport during the 2014 World Cup in Brazil, June 15, 2014. In a project called "On The Sidelines" Reuters photographers share pictures showing their own quirky and creative view of the 2014 World Cup in Brazil. REUTERS/Darren Staples (BRAZIL - Tags: SPORT SOCCER SOCIETY TRANSPORT) 

Angel Gomez Gamallo, 79, and his wife Luisa Fernandez Medarde, 81, leave a supermarket with a box full of food destined for one of their four children in Madrid April 29, 2014. When they retired a decade ago, Gomez and his wife had imagined spending their 3,600 euros in joint pension payments only on restaurants, holidays and toys for the grandkids. Today, their retirement money also helps support five families. The Spanish couple, like other relatively prosperous pensioners across southern Europe, are providing an informal safety net which has helped many in the younger generation to avoid widespread poverty despite record-high unemployment. Picture taken April 29, 2014. To match Insight story EUROPE-SOUTH/PENSIONS REUTERS/Susana Vera (SPAIN - Tags: BUSINESS EMPLOYMENT POLITICS SOCIETY) 

A soldier stands guard at an elevated walkway of a shopping district in central Bangkok May 25, 2014. Thailand's military tightened its grip on power on Sunday as it moved to douse smouldering protests fuelled by social media and to rally commercial agencies and business to revitalise a battered economy. REUTERS/Erik De Castro (THAILAND - Tags: POLITICS CIVIL UNREST) 

Soldiers hold their shields as they walk past a poster of Thailand's King Bhumibol Adulyadej at an elevated walkway at a shopping district in Bangkok May 25, 2014. Thailand's military tightened its grip on power on Sunday as it moved to douse smouldering protests fuelled by social media and to rally commercial agencies and business to revitalise a battered economy. REUTERS/Erik De Castro (THAILAND - Tags: POLITICS CIVIL UNREST MILITARY) 

Soldiers stand guard in front of a painting at an elevated walkway at a shopping district in central Bangkok May 25, 2014. Thailand's military tightened its grip on power on Sunday as it moved to douse smouldering protests fuelled by social media and to rally commercial agencies and business to revitalise a battered economy. REUTERS/Erik De Castro (THAILAND - Tags: POLITICS CIVIL UNREST MILITARY) 

Soldiers stand guard at an elevated walkway at a shopping district in central Bangkok May 25, 2014. Thailand's military tightened its grip on power on Sunday as it moved to douse smouldering protests fuelled by social media and to rally commercial agencies and business to revitalise a battered economy. REUTERS/Erik De Castro (THAILAND - Tags: POLITICS CIVIL UNREST MILITARY BUSINESS) 

A woman carries a child past soldiers guarding an elevated walkway at a shopping district in Bangkok May 25, 2014. Thailand's military tightened its grip on power on Sunday as it moved to douse smouldering protests fuelled by social media and to rally commercial agencies and business to revitalise a battered economy. REUTERS/Erik De Castro (THAILAND - Tags: POLITICS CIVIL UNREST) 

People from an elevated walkway look at protestors against military rule at the Victory Monument in Bangkok May 25, 2014. Thailand's military tightened its grip on power on Sunday as it moved to douse smouldering protests fuelled by social media and to rally commercial agencies and business to revitalise a battered economy. REUTERS/Erik De Castro (THAILAND - Tags: POLITICS CIVIL UNREST) 

Volunteers form a line as they pass down debris from burned houses after a fire burned several neighbourhoods in the hills in Valparaiso city, northwest of Santiago, April 16, 2014. Deadly forest fires in Valparaiso have killed at least 15 people, consumed 2,693 acres (1,090 hectares) and burned 2,900 homes, with 12,500 casualties. Fed by high temperatures and strong winds, the flames moved from forest areas at the top of the city on Saturday night and destroyed large swaths of predominantly low-income, wooden houses. REUTERS/Eliseo Fernandez (CHILE - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

A policeman wearing a face mask stands on a road during a hazy day in Shanghai, January 20, 2014. Chinese steelmakers and power plants are being forced to shop around for higher-quality raw materials to meet tougher air pollution standards, a move that will be a boon for global mining giants that produce premium-grade iron ore and coal. Picture taken January 20, 2014. REUTERS/Aly Song (CHINA - Tags: ENVIRONMENT BUSINESS) 

People walk through the snow in Hoboken, New Jersey January 21, 2014. A fast-moving cold front will plunge the U.S. Midwest into a deep freeze on Tuesday and dump up to a foot (30 cm) of snow on parts of the East Coast, forecasters said. REUTERS/Eric Thayer (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

A National Park Service employee clears snow and slush from a walkway to the Lincoln Memorial in Washington December 10, 2013. Fresh winter snow moved into the U.S. mid-Atlantic region on Tuesday, shutting schools and offices in the nation's capital and elsewhere as the mid-section of the country remained in the grip of Arctic air that showed no signs of easing. REUTERS/James Lawler Duggan (UNITED STATES - Tags: POLITICS ENVIRONMENT SOCIETY) 

A pedestrian walks by a fence outside Number One Regional Tuberculosis Hospital of the General Directorate of the Russian Federal Penitentiary Service, in Russia's Siberian city of Krasnoyarsk November 15, 2013. Pussy Riot punk band member Nadezhda Tolokonnikova has asked Russia's Supreme Court to throw out her conviction and two-year prison sentence, her lawyer Irina Khrunova said on Thursday. Tolokonnikova, 24, started a hunger strike in September, demanding a transfer from a prison where she said that a official had threatened her life and that inmates faced inhumane conditions including 17-hour work days. Prison authorities said on October 18 that Tolokonnikova would be moved, and Khrunova said there were indications she had been transferred to a prison in Siberia, about 3,600 km (2,250 miles) east of Moscow, but that she was unable to confirm it. According to local media on November 14, Tolokonnikova was escorted to Krasnoyarsk' s Number One Regional Tuberculosis Hospital. REUTERS/Ilya Naymushin (RUSSIA - Tags: CRIME LAW RELIGION ENTERTAINMENT HEALTH) 

Pedestrians standing in front of an electronic board displaying various stock prices outside a brokerage are reflected in a polished stone surface, in Tokyo October 23, 2013. Japan's Nikkei share average suffered its biggest decline in three weeks on Wednesday, hit by the dollar's tumble against the yen on heightened expectations the Federal Reserve will keep its stimulus in place until early next year. The Nikkei dropped 2.0 percent to 14,426.05, retreating from a 3-1/2 week high of 14,799.28 touched in the morning session and breaching its 25-day moving average of 14,432.21. REUTERS/Yuya Shino (JAPAN - Tags: BUSINESS) 

Children swim in a flooded walkway as rough waves crash on concrete banks along the coast of Manila Bay brought by Super Typhoon Usagi in Navotas City, metro Manila September 21, 2013. The year's most powerful typhoon slammed into the Philippines' northernmost islands on Saturday, cutting communication and power lines, triggering landslides and inundating rice fields, officials said. Packing winds of 185 kph (114 mph) near the center and gusts of up to 220 kph, Typhoon Usagi weakened after hitting the Batanes island group, and is moving slowly west-northwest at 19 kph towards southern China, the weather bureau said. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: DISASTER SOCIETY ENVIRONMENT) 

Two men carrying a canoe walk on a muddy street after the community of Bowness was flooded by the Bow River in Calgary, Alberta, June 23, 2013. Power outages in the Canadian oil capital of Calgary could last for weeks or even months, city authorities said on Sunday, as record breaking flood waters moved downstream to threaten smaller communities in southeastern Alberta. REUTERS/Melissa Renwick (CANADA - Tags: DISASTER ENVIRONMENT) 

A Gezi Park demonstrator sleeps on the pavement in front of a bus stop at Taksim Square in Istanbul June 14, 2013. Turkish protesters said on Friday Prime Minister Tayyip Erdogan had pledged to hold off on plans to redevelop Gezi Park until a court ruled on the project, a move they said was a positive sign after two weeks of protest. REUTERS/Murad Sezer (TURKEY - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

A man sleeps on a road divider as lights of the moving traffic are beamed on him in New Delhi May 9, 2013. REUTERS/Adnan Abidi (INDIA - Tags: SOCIETY TPX IMAGES OF THE DAY) 

Parmeshwar Pujari, a 62-year-old cancer patient eats food while lying on the pavement outside the Tata Memorial Hospital in Mumbai March 4, 2013. An Indian government panel has proposed that prices of patented medicines be based on the country's per capita income, a move that would substantially reduce prices of costly drugs made by global pharmaceutical firms. REUTERS/Danish Siddiqui (INDIA - Tags: BUSINESS HEALTH SOCIETY POVERTY) 

Water pushed in by Hurricane Sandy inundates a walkway in Southampton, New York, October 29, 2012. Hurricane Sandy, the monster storm bearing down on the East Coast, strengthened on Monday after hundreds of thousands moved to higher ground, public transport shut down and the stock market suffered its first weather-related closure in 27 years. REUTERS/Lucas Jackson (UNITED STATES - Tags: ENVIRONMENT DISASTER) 

People are pictured next to moving walkways at the newly built A-Plus terminal section at the Fraport airport during a guided media tour in Frankfurt September 28, 2012. A-Plus will officially open on October 2. REUTERS/Lisi Niesner (GERMANY - Tags: BUSINESS TRANSPORT) 

A passenger pushes a trolley up a travelator during a protest by the cleaning staff at Barcelona's airport May 29, 2012. Cleaning staff working for a company which has a contract with the airport demonstrated against pay and benefits cuts made by their employer. REUTERS/Albert Gea (SPAIN - Tags: CIVIL UNREST BUSINESS TRANSPORT) 

A view of the Grand Canyon is seen from an unfinished walkway at a skywalk overlooking the Grand Canyon and the Colorado River below, on the Hualapai Indian Reservation, Arizona February 28, 2012. The tiny Hualapai nation, in a bold move that could serve as a test of the limits of the sovereign power of Native American tribes over non-members, exercised its right of eminent domain last month to take over the management of the site and kick out the non-Indian developer. The dispute over the potentially lucrative Skywalk -- which all agree could draw up to 3,000 visitors a day -- pits the tribe's sovereign rights over a site it sees as its economic lifeblood against a developer's contractual right to manage the attraction for 25 years and share the profits. Picture taken February 28. REUTERS/Robert Galbraith (UNITED STATES - Tags: BUSINESS SOCIETY TRAVEL) 

Residents walk on a wooden walkway at a water village on Malaysia's island of Labuan February 7, 2012. The Naftiran Intertrade Company (NICO), an oil-trading firm owned by the Iranian government, dissolved its base on the British tax haven of Jersey on Jan. 8 with a "certificate of continuance" that indicated it would move to Labuan, an island off the coast of Malaysia. Picture taken February 7, 2012. To match Special Report IRAN/HAVENS REUTERS/Bazuki Muhammad (MALAYSIA - Tags: SOCIETY BUSINESS) 

A resident walks on a wooden walkway at a water village on Malaysia's island of Labuan February 7, 2012. The Naftiran Intertrade Company (NICO), an oil-trading firm owned by the Iranian government, dissolved its base on the British tax haven of Jersey on Jan. 8 with a "certificate of continuance" that indicated it would move to Labuan, an island off the coast of Malaysia. Picture taken February 7, 2012. To match Special Report IRAN/HAVENS REUTERS/Bazuki Muhammad (MALAYSIA - Tags: SOCIETY BUSINESS) 

A girl balances herself on a plank as she crosses from her newly built house to the main wooden walkway at a water village on Malaysia's island of Labuan February 8, 2012. The Naftiran Intertrade Company (NICO), an oil-trading firm owned by the Iranian government, dissolved its base on the British tax haven of Jersey on Jan. 8 with a "certificate of continuance" that indicated it would move to Labuan, an island off the coast of Malaysia. Picture taken February 8, 2012. To match Special Report IRAN/HAVENS REUTERS/Bazuki Muhammad (MALAYSIA - Tags: SOCIETY BUSINESS) 

A worker flattens a walkway next to the construction site of the new headquarters of the European Central Bank (ECB) in Frankfurt, January 16, 2012. Commercial banks parked almost half a trillion euros at the European Central Bank, the highest on record, as the mix of debt crisis worries and a recent giant injection of ECB cash left banks awash with money but too scared to lend it. The European Central Bank plans to move its headquarter in early 2014. REUTERS/Kai Pfaffenbach (GERMANY POLITICS - Tags: BUSINESS CONSTRUCTION) POLITICS) 

Pedestrians walk past a housing advertisement in the south of Market district in San Francisco, California November 21, 2011. San Francisco's southern neighborhoods are benefiting not just from the suddenly rich, but also from start-ups increasingly locating in the city rather than suburban Silicon Valley. Twitter, for example, next year is set to move into a building on a dilapidated stretch of Market Street near San Francisco City Hall, about a mile away from the company's current digs. Picture taken November 21. REUTERS/Stephen Lam (UNITED STATES - Tags: BUSINESS REAL ESTATE) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A drug addict sifts through used syringes, cigarette butts and other objects in central Athens' Panepistimiou Street, at an area where drug addicts gather, November 16, 2011. Athens Mayor Giorgos Kaminis believes that there will be a fall in crime in the city centre from next month, when drug rehabilitation centres are relocated."Drug addicts will begin leaving the downtown area in mid-October when the methadone centres move," he told Skai radio station in an interview on September 30, 2011.REUTERS/Yannis Behrakis (GREECE - Tags: DRUGS SOCIETY) 

Vehicles move through a boulevard covered with trees at Akhnoor village on the outskirts of Jammu November 6, 2011. REUTERS/Mukesh Gupta (INDIAN-ADMINISTERD KASHMIR - Tags: SOCIETY) 

A woman walks past Greek newspapers bearing cover photos of Greek Premier George Papandreou in Athens November 1, 2011. Six senior members of Greece's ruling party called Prime Minister George Papandreou to resign following his decision to let Greeks vote on a bailout package -- a move that stunned markets and threw Greece's euro zone membership into question. REUTERS/John Kolesidis (GREECE - Tags: POLITICS BUSINESS MEDIA) 

Beggars sit outside a small church at a central street in Athens October 26, 2011. Banks moved closer on Wednesday to agreeing to cut the value of their Greek bond holdings in half under a bailout plan that Finance Minister Evangelos Venizelos was quoted as saying would deliver 15 euros back in cash for every 100 invested. REUTERS/Yiorgos Karahalis (GREECE - Tags: BUSINESS POLITICS SOCIETY) 

Rainwater from Tropical Storm Lee stands along the walkway at an apartment complex in Mobile, Alabama, Sunday, September 4, 2011.
The National Hurricane Center said the slow-moving storm could dump up to 20 inches of rain from the central Gulf Coast northward into the Tennessee Valley through Sunday and cause extensive flooding and flash flooding. REUTERS/ Lyle W. Ratliff (UNITED STATES - Tags: ENVIRONMENT) 

A member of Estonian special police bomb squad walks next to a bomb-disposal robot outside the Defence Ministry building in Talinn August 11, 2011. A man fired shots and set off a smoke bomb at the Defence Ministry in Estonia's capital Tallinn and then was killed as police moved in, officials said on Thursday. The prosecutor's office said in a statement that a man with a gun broke into the Defence Ministry building in the centre of Tallinn. He threw a smoke bomb inside the building and took two hostages, who were later freed. REUTERS/Stringer (ESTONIA - Tags: CONFLICT SOCIETY MILITARY) 

Residential homes line a deserted street in the Kangbashi district of the town of Ordos in China's Inner Mongolia Autonomous Region May 11, 2011. About 30 km (19 miles) north of Dongsheng is the Kangbashi district of Ordos, which means "palaces" in the Mongolian language, an area filled with thousands of residential apartments and duplex-style homes, built to house mainly workers for the nearby coal mines just outside the town. However, the estimated one million people that were expected to move into or visit the district's now decaying buildings, have yet to appear. Picture taken May 11, 2011. REUTERS/David Gray (CHINA - Tags: CITYSCAPE BUSINESS CONSTRUCTION SOCIETY EMPLOYMENT TRAVEL) 

People watch professionals Capoeira dancers as they perform moves on the promenade in Tel Aviv May 11, 2011. A group of international professionals are in Israel for a 4 day Capoeira festival, holding shows and workshops of the Afro-Brazilian dance style which combines music and martial arts. REUTERS/Nir Elias (ISRAEL - Tags: ENTERTAINMENT SOCIETY) 

A shopper pushes a shopping trolley on an escalator in a supermarket in Charenton near Paris April 6, 2011. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY FOOD) 

A woman crosses State Street in Chicago February 1, 2011. A colossal winter storm stretching from New Mexico to Maine hit the heartland of the United States with snow, high winds and freezing rain on Tuesday, and experts said the worst was still to come as the monster event moved northeast and temperatures plunged. REUTERS/John Gress (UNITED STATES - Tags: ENVIRONMENT) 

The Olympic Stadium being constructed for the London 2012 Olympic games, is pictured in east London January 20, 2011. The British Olympic Association (BOA) has urged the London 2012 Olympic stadium legacy committee to honour the bid commitment and retain an athletics track after the Games.Premier League soccer clubs West Ham United and Tottenham Hotspur are vying to move to the east London site and the Olympic Park Legacy Company (OPLC) will announce its recommended tenant this month. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT ATHLETICS OLYMPICS SOCCER) 

Car tracks are seen on a snow-covered country lane outside the village of Manschnow near the Polish border, December 29, 2010. The picture was taken with a slow shutter from within a moving vehicle. REUTERS/Thomas Peter (GERMANY - Tags: ENVIRONMENT IMAGES OF THE DAY TRANSPORT)