Attendees play Darksiders Genesis by Airship Syndicate at the Paris Games Week (PGW), a trade fair for video games in Paris, France, October 29, 2019. REUTERS/Benoit Tessier

A U.S. Customs and Border Protection Air and Marine Operations aerostat, which is a tethered blimp-type airship deployed to combat illegal activity along the border, is pictured near Penitas, Texas, U.S., April 7, 2019. REUTERS/Loren Elliott

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

Crew members secure the Goodyear Airship "Wingfoot Two" after it arrived at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

Crew members put up a ladder after the Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

Assistant chief pilot Bill Bayliss check the instruments after the Goodyear Airship "Wingfoot Two" arrived at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

A ground crew member holds a wind flag as the Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

Assistant chief pilot Bill Bayliss check the instruments after the Goodyear Airship "Wingfoot Two" arrived at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

Chief pilot Matthew St. John gives a tour of the Goodyear Airship "Wingfoot Two" after it arrived at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

A ground crew member holds a wind flag as the Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S. December 15, 2017. REUTERS/Kevork Djansezian

The Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S., December 15, 2017. REUTERS/Kevork Djansezian

A ground crew member holds a wind flag as the Goodyear Airship "Wingfoot Two" arrives at its new home at the Goodyear air operation base in Carson, California, U.S., December 15, 2017. REUTERS/Kevork Djansezian

A worker holds the tail of the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimps, as the airship is decommissioned in Carson, California, U.S. March 14, 2017. REUTERS/Mike Blake

A worker climbs a pole to release the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimps, as the airship is decommissioned in Carson, California, U.S. March 14, 2017. REUTERS/Mike Blake

The moon rises above the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimp, as the decommissioning of the airship begins in Carson, California, U.S. March 14, 2017. REUTERS/Mike Blake

The moon shines over the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimps, as workers being to decommission the airship in Carson, California, U.S. March 14, 2017. REUTERS/Mike Blake

Workers lift a tail fin of the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimps, as the airship is decommissioned in Carson, California, U.S. March 14, 2017. REUTERS/Mike Blake

Parts of the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimps, are towed away as the airship is decommissioned in Carson, California, U.S., March 14, 2017. REUTERS/Mike Blake

Workers take apart the "Spirit of Innovation", the last of Goodyear's GZ-20 model blimps, as the airship is decommissioned in Carson, California, U.S., March 14, 2017. REUTERS/Mike Blake

Workers look at damage to the Airlander 10 hybrid airship after a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples TPX IMAGES OF THE DAY

The Airlander 10 hybrid airship is seen after a crash-landing during a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples

People look through the perimeter fence at the Airlander 10 hybrid airship following a crash-landing during a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship is seen after a crash-landing during a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples

Workers look at damage to the Airlander 10 hybrid airship after a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples

A cover is placed over damage to the Airlander 10 hybrid airship after a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples

A man looks at damage to the Airlander 10 hybrid airship after a test flight at Cardington Airfield in Britain, August 24, 2016. REUTERS/Darren Staples

A helicopter flies over the Airlander 10 hybrid airship before its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

A man watches the Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

A man watches from a lorry as the Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples TPX IMAGES OF THE DAY

The Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship makes its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship undergoes checks before its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship undergoes checks before its maiden flight at Cardington Airfield in Britain, August 17, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship undergoes checks before its maiden flight at Cardington Airfield in Britain, August 14, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship undergoes checks before its maiden flight at Cardington Airfield in Britain, August 14, 2016. REUTERS/Darren Staples

The Airlander 10 hybrid airship is seen at sunrise after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

The Airlander 10 hybrid airship is seen at sunrise after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

Cyclists pass in front of the Airlander 10 hybrid airship which recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

The Airlander 10 hybrid airship is seen after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

The Airlander 10 hybrid airship is seen after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

The Airlander 10 hybrid airship is seen after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

The Airlander 10 hybrid airship is seen after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

The Airlander 10 hybrid airship is seen after it recently left the hangar for the first time to commence ground systems tests before its maiden flight, at Cardington Airfield in Britain August 9, 2016. REUTERS/Gareth Bumstead

A blimp reading "Google must pay tax" is seen floating over the Tel Aviv skyline April 3, 2016. Israeli attorney Guy Ofir is the mastermind behind the blimp and told Reuters on Sunday that the airship will float until midnight some 200 meters from Google's offices with the intention of drawing public and media awareness to Google's tax issue. REUTERS/Baz Ratner