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 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)

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)

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)

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)

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 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 mother walks with her daughter along a snow covered walkway in Hoboken, New Jersey, December 26, 2010. Up to a foot of snow is expected to fall in the New York area on Sunday and Monday as a storm moves through the East Coast of the U.S. REUTERS/Gary Hershorn (UNITED STATES - Tags: ENVIRONMENT SOCIETY)

Passengers walk inside the newly constructed T3 terminal of Indira Gandhi International Airport in New Delhi July 15, 2010. REUTERS/B Mathur (INDIA - Tags: TRANSPORT BUSINESS)

A handful of people walk along empty corridors at a subway station during morning rush hour in Madrid June 30, 2010. A strike by Metro workers snarled traffic for the third day in Madrid on Wednesday and unions said the protest against austerity measures aimed at getting Spain's deficit under control could become indefinite. REUTERS/Sergio Perez (SPAIN - Tags: CIVIL UNREST BUSINESS)

A worker passes through a walkway in an office of Goldman Sachs in London April 20, 2010. Goldman Sachs Group Inc reported stunningly strong quarterly earnings on Tuesday, overshadowing the Financial Services Authority's (FSA) move to follow their U.S. counterparts in pursuing civil fraud allegations against the dominant Wall Street bank. REUTERS/Toby Melville (BRITAIN - Tags: BUSINESS)

Airport workers clean the new T-3 terminal at the Pablo Ruiz Picasso Airport in Malaga, southern Spain, March 15, 2010. The new terminal designed by architect Bruce S. Fairbanks will double its capacity to 30 million passengers a year, according to Spanish airport authorities. REUTERS/Jon Nazca (SPAIN - Tags: TRANSPORT SOCIETY)

Dick Simmons of Old Town, Alexandria, shovels his walkway in Alexandria, Virginia, December 19, 2009. Up to 22 inches (56 cms) of snow was expected to fall by Saturday night in the Baltimore-Washington area, more than any snowstorm to hit the region since February 2003, as the storm system moved north into New York and New England. REUTERS/Molly Riley (UNITED STATES - Tags: ENVIRONMENT)

A woman use her mobile phone as she walks on a moving walkway in Tokyo August 3, 2009. REUTERS/Stringer (JAPAN BUSINESS EMPLOYMENT)

A child on a moving walkway passes an advertisement for holiday company XL at Gatwick Airport, near London on September 12, 2008. The nation's third largest package holiday operator XL Leisure Group grounded all flights on Friday after going into administration, leaving tens of thousands of holidaymakers stranded. REUTERS/Luke MacGregor (BRITAIN)

Visitors move along a walkway used in the past by arriving prisoners as a route to their cells, on Alcatraz in San Francisco April 30, 2007. The former federal penitentiary has undergone a $3.5 million renovation to help visitors gain an understanding of what life was like in the notorious prison. REUTERS/Robert Galbraith (UNITED STATES)

A young girl blows a kiss to the image of the Virgin of Guadalupe as
she is carried along a moving walkway in Mexico City's Basilica of
Guadalupe, July 24, 2002. Pope John Paul II will canonize Juan Diego
next week during his two day visit to Mexico. Juan Diego is the
indigenous Mexican whose vision of the Virgin Mary, known as the Virgin
of Guadalupe, is one of the pillars of faith to Mexican Catholics.
REUTERS/Andrew Winning

AW/HB

A woman looks up at the image of the Virgin of Guadalupe as she stands
on a moving walkway with other pilgrims in Mexico City's Basilica of
Guadalupe, July 24, 2002. Pope John Paul II will canonize Juan Diego
next week during his two day visit to Mexico. Juan Diego is the
indigenous Mexican whose vision of the Virgin Mary, known as the Virgin
of Guadalupe, is one of the pillars of faith to Mexican Catholics.
REUTERS/Andrew Winning

AW/HB

Catholic parents accompany their scared children pass RUC police in
riot gear holding back Loyalists protesters on the Ardoyne Road in
North Belfast, September 3, 2001, who are trying to prevent the
children from reaching their Roman Catholic school. Last-minute efforts
to broker an end to the dispute over the children's route to school
failed on Sunday, and the police and army moved in at daylight to erect
a protective walkway. REUTERS/str

PM/AA

Loyalist women protesting on the Ardoyne Road in North Belfast are
pushed back by Royal Ulster Constabulary police in riot gear, September
3, 2001, as they try to prevent Catholic children reaching a Roman
Catholic school. Last-minute efforts to broker an end to the dispute
over the children's route to school failed on Sunday, and the police
and army moved in at daylight to erect a protective walkway.
REUTERS/stringer

PM/AA

Lorin Hoven sits near a moving walkway at Chicago's O'hare Airport while she waits for a flight to Conneticut November 22, 2000. 20.5 million passengers are expected to travel by air over the Thanksgiving holiday season which is tallied from November 17 thru 26. A record 19.8 million traveled by air last year during the holiday.

SJO/RCS

People made homeless by Bangladesh floods squat on a raised walkway in Dhaka's Uttarkhan area waiting to be moved to dry shelters September 8. The floods have killed at least 730 people and left millions homeless or marooned.

People made homeless by Bangladesh floods squat on a raised walkway in Dhaka's Uttarkhan area waiting to be moved to dry shelters September 8. The floods have killed at least 730 people and left millions homeless or marooned.

AN/CC/SB

William Davis uses a kitchen broom to start cleaning up his walkway August 27 as Hurricane Bonnie moves northward from storm-ravaged Wilmington. A 100-year-old tree crashed just short of his house. Hurricane Bonnie hit the area with 115 mile-per-hour winds for almost 24 hours.

BPS/RC/KC

Visitors to the Beijing Blue Zoo, the city's newest aquarium, pass a large shark which is part of a mural advertising the New Zealand-built complex which officially opened November 29. The high tech aquarium uses salt imported from Israel and houses sharks, lobsters, tropical and ocean going fish and features a moving walkway designed to maximise visitors' exposure to all facets of marine life as inhabitants of the tank swim overhead. Admission is 70 yuan ($8.43) for adults and 30 yuan ($3.60) for children.

CHINA AQUARIUM

An engineer inspects construction work on the roof of the main terminal building at Hong Kong's new Chek Lap Kok airport November 24. The airport is set to become the new regional aviation hub when it opens in April 1998. The terminal building is 1.3 km long with a floor area of 516,000 square metres and 2.5 km of moving walkways, and is designed to handle about 35 million passengers per year.

HONGKONG

Visitors walk on a spirale walkway on top of the German Reichstag during a topping-out ceremony in Berlin September 18. Berlin's famous landmark the Quadriga on the top of the Brandenburg Gate sits in the foreground in front of the once and future home of the German parliament. The building is scheduled to be completed by the spring of 1999 when the government plans to move from Bonn to Berlin. fa

Visitors walk on a spirale walkway on top of the German Reichstag during a topping-out ceremony in Berlin September 18. Berlin's famous landmark the Quadriga on the top of the Brandenburg Gate sits in the foreground in front of the once and future home of the German parliament. The building is scheduled to be completed by the spring of 1999 when the government plans to move from Bonn to Berlin.

GERMANY REICHSTAG