A Hertz Global Holdings Inc. shuttle bus is seen at Los Angeles International Airport (LAX) on an unusually empty Memorial Day weekend during the outbreak of the coronavirus disease (COVID-19) in Los Angeles, California, U.S., May 23, 2020. REUTERS/Patrick T. Fallon

A flight crew member disembarks from a hotel shuttle van while wearing a protective mask at Los Angeles International Airport (LAX) on an unusually empty Memorial Day weekend during the outbreak of the coronavirus disease (COVID-19) in Los Angeles, California, U.S., May 23, 2020. REUTERS/Patrick T. Fallon

A Hertz Global Holdings Inc. shuttle bus is seen at Los Angeles International Airport (LAX) on an unusually empty Memorial Day weekend during the outbreak of the coronavirus disease (COVID-19) in Los Angeles, California, U.S., May 23, 2020. REUTERS/Patrick T. Fallon

Employees of Baidu wearing face masks get on a shuttle bus from the company's headquarters to another office compound in Beijing, following the novel coronavirus disease (COVID-19) outbreak, China May 18, 2020. REUTERS/Tingshu Wang

Workers wait in line for a shuttle at Tesla's primary vehicle factory after CEO Elon Musk announced he was defying local officials' coronavirus disease (COVID-19) restrictions by reopening the plant in Fremont, California, U.S. May 12, 2020. REUTERS/Stephen Lam

A general view of an NHS shuttle bus road marking outside the NHS Nightingale Hospital at the Excel Centre, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 5, 2020. REUTERS/John Sibley

Tourists travel in a shuttle bus to visit the Mutianyu section of the Great Wall of China on the first day of the five-day Labour Day holiday following the coronavirus disease (COVID-19) outbreak, on the outskirts of Beijing, China May 1, 2020. REUTERS/Thomas Peter

A woman wearing face masks sits with her dog as the spread of coronavirus disease (COVID-19) continues, aboard a shuttle bus at McCarran International Airport in Las Vegas, Nevada U.S., April 9, 2020. REUTERS/Shannon Stapleton

A medical worker wearing a protective mask sleeps inside a free shuttle service for healthcare workers following the suspension of mass transportation in Metro Manila to contain the spread of coronavirus disease (COVID-19), in Manila, Philippines, March 30, 2020. REUTERS/Eloisa Lopez

A medical worker wearing a protective mask rides a free shuttle service for healthcare workers following the suspension of mass transportation in Metro Manila to contain the spread of the coronavirus disease (COVID-19), in Manila, Philippines, March 30, 2020. REUTERS/Eloisa Lopez

Stranded tourists from Germany wait for a shuttle bus to transport them to the airport to board a chartered flight back to Germany on the fourth day of the lockdown imposed by Nepal's government amid concerns of the spread of the coronavirus disease (COVID-19), in Kathmandu, Nepal March 27, 2020. REUTERS/Navesh Chitrakar

Passengers wearing face masks to prevent the spread of coronavirus disease (COVID-19) are seen inside a shuttle bus at Shanghai Hongqiao International Airport in Shanghai, China March 25, 2020. REUTERS/Aly Song

A soldier checks the body temperature of a health worker before entering a free shuttle service following the suspension of mass transportation to contain the spread of coronavirus disease (COVID-19), in Quezon City, Metro Manila, Philippines, March 20, 2020. REUTERS/Eloisa Lopez

A soldier waits for health workers to board a free shuttle service following the suspension of mass transportation to contain the spread of coronavirus disease (COVID-19), in Quezon City, Metro Manila, Philippines, March 20, 2020. REUTERS/Eloisa Lopez

A health worker enters a free shuttle service following the suspension of mass transportation to contain the spread of coronavirus disease (COVID-19), in Quezon City, Metro Manila, Philippines, March 20, 2020. REUTERS/Eloisa Lopez

A soldier checks the body temperature of health workers before entering a free shuttle service following the suspension of mass transportation to contain the spread of coronavirus disease (COVID-19), in Quezon City, Metro Manila, Philippines, March 20, 2020. REUTERS/Eloisa Lopez

Asylum seekers are boarded into a shuttle outside the housing facilities for refugees at Lacolle, Quebec, Canada March 19, 2020. REUTERS/Christinne Muschi?

A family and other people from mainland China wait for free shuttle buses to a border gate to Zhuhai in Guangdong province, in Macau, China December 21, 2019. REUTERS/Jason Lee

People from mainland China wait for free shuttle buses to a border gate to Zhuhai, Guangdong province, in Macau, China December 21, 2019. REUTERS/Jason Lee

People from mainland China gather for free shuttle buses outside the Emperor Palace hotel and casino in Macau, China December 21, 2019. REUTERS/Jason Lee

People from mainland China gather for free shuttle buses outside the Emperor Palace hotel and casino in Macau, China December 21, 2019. REUTERS/Jason Lee

A traveler makes his way to a shuttle stop after a pre-Thanksgiving holiday snowstorm caused more than 460 flight cancellations at Denver International Airport, Colorado, U.S., November 26, 2019. REUTERS/Bob Strong

An airport worker clears a shuttle stop after a pre-Thanksgiving holiday snowstorm caused more than 460 flight cancellations at Denver International Airport, Colorado, U.S., November 26, 2019. REUTERS/Bob Strong

An airport worker clears a shuttle stop after a pre-Thanksgiving holiday snowstorm caused more than 460 flight cancellations at Denver International Airport, Colorado, U.S., November 26, 2019. REUTERS/Bob Strong

Fans of the National Women's Soccer League (NWSL) team the North Carolina Courage toast beers aboard a shuttle bus en route to the team's championship match against the Chicago Red Stars, in Raleigh, North Carolina, U.S. October 27, 2019. REUTERS/Amy Tennery

A shuttle bus for fans of the National Women's Soccer League (NWSL) team the North Carolina Courage waits to collect passengers ahead of the team's championship match against the Chicago Red Stars, in Raleigh, North Carolina, U.S. October 27, 2019. REUTERS/Amy Tennery

Oct 6, 2019; Nashville, TN, USA; Tennessee Titans quarterback Marcus Mariota (8) shuttles the ball out to Titans running back Derrick Henry (22) (not pictured) against Buffalo Bills defensive end Darryl Johnson (92) during the second half at Nissan Stadium. Mandatory Credit: Jim Brown-USA TODAY Sports

While the world’s Boeing 737 MAX fleet remains grounded in the wake of two fatal crashes, one aircraft sporting Air Canada livery has been spotted on flight tracking websites shuttling back and forth between Quebec and Ontario.

Bosch IoT shuttle is pictured at the 2019 Frankfurt Motor Show (IAA) in Frankfurt, Germany. September 10, 2019. REUTERS/Wolfgang Rattay

Sue Watson moves from a shuttle to another bus at an assisted living community after a mandatory evacuation order was issued ahead of the arrival of Hurricane Dorian in Kissimmee, Florida, U.S. September 2, 2019. REUTERS/Gregg Newton

An autonomous shuttle bus is seen during a public trial on Sentosa Island, Singapore August 26, 2019. Picture taken August 26, 2019. REUTERS/Travis Teo

Passengers queue up for shuttle buses as anti-extradition bill demonstrators block the Mass Transit Railway (MTR) train service at a station in Hong Kong, China July 30, 2019. REUTERS/Tyrone Siu

Space shuttle astronaut Charlie Precourt, Apollo Flight Director Gerry Griffin, Apollo 16 astronaut Charlie Duke, Apollo 11 astronaut Michael Collins and Apollo 9 astronaut Rusty Schweikart attend a panel discussion on the 50th anniversary of launch of Apollo 11, in Cocoa Beach, Florida, U.S., July 16, 2019. REUTERS/Joe Skipper

Space shuttle astronaut Charles Precourt, Apollo Flight Director Gerry Griffin, Apollo 16 astronaut Charlie Duke, Apollo 11 astronaut Michael Collins and Apollo 9 astronaut Rusty Schweikart stand together at the conclusion of a panel discussion on the 50th anniversary of launch of Apollo 11 in Cocoa Beach, Florida, U.S., July 16, 2019. REUTERS/Joe Skipper

Space shuttle astronaut Jim Wetherbee signs an autograph for a space enthusiast during a parade near the launch site of the Apollo 11 Moon mission ahead of its 50th anniversary in Cocoa Beach, Florida, U.S. July 13, 2019. REUTERS/Gregg Newton

A space enthusiast rushes to snap a selfie with space shuttle flight engineer and astronaut Jerry Ross during a parade near the launch site of the Apollo 11 Moon mission ahead of its 50th anniversary in Cocoa Beach, Florida, U.S. July 13, 2019. Ross flew on seven shuttle missions, making him the joint record holder for most space flights. REUTERS/Gregg Newton

A space enthusiast exchanges a thumbs-up with space shuttle astronaut Andy Allen during a parade near the launch site of the Apollo 11 Moon mission ahead of its 50th anniversary in Cocoa Beach, Florida, U.S. July 13, 2019. REUTERS/Gregg Newton

Space shuttle astronaut Bob Cabana waves to space enthusiasts during a parade near the launch site of the Apollo 11 Moon mission ahead of its 50th anniversary in Cocoa Beach, Florida, U.S. July 13, 2019. REUTERS/Gregg Newton

Astronauts, including space shuttle flight engineer Jerry Ross (C), wave to space enthusiasts during a parade near the launch site of the Apollo 11 Moon mission ahead of its 50th anniversary in Cocoa Beach, Florida, U.S. July 13, 2019. Ross flew on seven shuttle missions, making him the joint record holder for most space flights. REUTERS/Gregg Newton

Apollo astronaut Al Worden speaks with a space enthusiast during pub crawl near the launch site of the Apollo 11 moon mission ahead of its 50th anniversary in Cocoa Beach, Florida, U.S. July 12, 2019. Just behind Worden is Skylab astronaut and space shuttle pilot Rick Hauck. Guests with the Astronaut Scholarship Foundation visited several pubs in Cocoa Village, while mingling with astronauts from the U.S. Space programs. REUTERS/Gregg Newton

French police escort a shuttle bus in front of the Hotel de Berri after Confederation of African Football president Ahmad Ahmad was being questioned by French authorities in Paris, France, June 6, 2019. REUTERS/Gonzalo Fuentes

French police escort a shuttle bus in front of the Hotel de Berri after Confederation of African Football president Ahmad Ahmad was being questioned by French authorities in Paris, France, June 6, 2019. REUTERS/Gonzalo Fuentes

Employees wait for a shuttle bus at a 5G testing park at Huawei's headquarters in Shenzhen, Guangdong province, China May 29, 2019. Picture taken May 29, 2019. REUTERS/Jason Lee

Employees wait for a shuttle bus at a 5G testing park at Huawei's headquarters in Shenzhen, Guangdong province, China May 29, 2019. Picture taken May 29, 2019. REUTERS/Jason Lee

An employee looks at a mobile phone upon her arrival at Huawei Songshan Lake New Campus by shuttle bus from Shenzhen in the morning, in Dongguan, Guangdong province, China May 31, 2019. Picture taken May 31, 2019. REUTERS/Jason Lee

An employee takes a nap in a shuttle bus on the way from Shenzhen to Huawei Songshan Lake New Campus in the morning, in Dongguan, Guangdong province, China May 31, 2019. Picture taken May 31, 2019. REUTERS/Jason Lee

Employees take a nap in a shuttle bus on the highway from Shenzhen to Huawei Songshan Lake New Campus in the morning, in Dongguan, Guangdong province, China May 31, 2019. Picture taken May 31, 2019. REUTERS/Jason Lee

Charlie Blackwell-Thompson, launch director for NASA's Exploration Ground Systems Program, stands with former Apollo Launch Team member and former Space Shuttle Launch Director Bob Sieck, at her console in Firing Room 4 during a NASA "Apollo - Then and Now" event at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 23, 2019. REUTERS/Joe Skipper

A driver of a tourist shuttle wears a hat with a red star as she poses for pictures at the Longmen Grottoes in Luoyang, Henan province, China January 21, 2019. REUTERS/Thomas Peter SEARCH "CHINA HENAN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

May 11, 2019; Yokohama, JPN; Devon Allen celebrates after running the anchor leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Devon Allen celebrates after running the anchor leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Members of the United States mixed shuttle hurdles relay take a victory lap with flags after winning in 54.96 during the IAAF World Relays at International Stadium Yokohama. From left: Devon Allen, Freddie Crittenden, Christina Manning (Christina Clemons) and Sharika Nelvis. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Queen Harrison runs the second leg on the United States mixed shuttle hurdles relay that won in its heat in 55.09 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Members of the United States mixed shuttle hurdles relay pose with flags after winning in 54.96 during the IAAF World Relays at International Stadium Yokohama. From left: Devon Allen, Sharika Nelvis, Christina Manning (Christina Clemons) and Freddie Crittenden. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Sharika Nelvis runs the third leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Christina Manning (Christina Clemons) runs the first leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Christina Manning (Christina Clemons) runs the first leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Sharika Nelvis runs the third leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Queen Harrison runs the second leg on the United States mixed shuttle hurdles relay that won in its heat in 55.09 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports

May 11, 2019; Yokohama, JPN; Freddie Crittenden runs the second leg on the United States mixed shuttle hurdles relay that won in 54.96 during the IAAF World Relays at International Stadium Yokohama. Mandatory Credit: Kirby Lee-USA TODAY Sports