A Boeing 777-300 from Swiss International Airlines lands on a foggy morning at Zurich Airport, on Friday, October 13, 2017, in Zurich, Switzerland. The high humidity renders the air vortex visible. (Photo by Christian Merz/Keystone via AP Photo)

A mahout guards the elephants during the annual Vrischikolsavam festival, which features a colourful procession of decorated elephants along with drum concerts, at a temple in Kochi, India, November 18, 2017. (Photo by Sivaram V/Reuters)

A Philippine Airlines A300 Airbus plane lies near the service road of a highway south of Manila after it overshot the runway, September 19, 1987 in Manila upon landing from Singapore. Nobody was injured among 135 passengers and crewmen on board. (Photo by Bullit Marquez/AP Photo)

The Olaf balloon glides over Central Park West during the Macy's Thanksgiving Day Parade in New York, Thursday, November 23, 2017. The Macy's Thanksgiving Day parade is the largest parade in the world and has been held since 1924. (Photo by Craig Ruttle/AP Photo)

A woman is helped out of the wrecked car of a train that derailed at the station of Pioltello Limito, on the outskirts of Milan, Italy, Thursday, January 25, 2018. Italian officials said that the commuter train derailed in northern Italy, killing some people, seriously injuring 10 and trapping others heading into Milan at the start of the work day. (Photo by AP Photo/Stringer)

Rev. Yeon Ah Lee Moon of the Sanctuary Church holds a gold AR-15 during a ceremony to rededicate marriages at the World Peace and Unification Sanctuary in Newfoundland, Pennsylvania, USA, 28 February 2018. The church, a breakaway from the Unification Church, believes guns are a symbol of the “rod of iron” referenced in the Book of Revelations. (Photo by Jim Lo Scalzo/EPA/EFE)

Performers Roni, Liv and Becky behind the scenes at Great Yarmouth Hippodrome Circus, England. (Photo by Nick Warner/The Guardian)

Russian cadets march during the annual cadet schools get-together in Moscow, Russia on March 30, 2018. (Photo by Mladen Antonov/AFP Photo)