In this March 14, 2015, file photo, people watch a landing Delta Air Lines jet approach the Narita International Airport from a popular viewing spot at Sakuranoyama Park in Narita, east of Tokyo. (Photo by Koji Sasahara/AP Photo)





A plane flies over a chimney of an oil refinery in Kawasaki, south of Tokyo in this January 30, 2013 file photo. (Photo by Toru Hanai/Reuters)





An aircraft passes over houses at it lands at Heathrow Airport near London, Britain, December 11, 2015. Picture taken December 11, 2015. (Photo by Neil Hall/Reuters)





A Norwegian aircraft takes off past the air traffic control tower of Pablo Ruiz Picasso Airport in Malaga, southern Spain, in this June 8, 2015 file photo. (Photo by Jon Nazca/Reuters)





A plane flies over highrise buildings during early morning in Beijing, China, February 17, 2016. (Photo by Kim Kyung-Hoon/Reuters)





A Thai Airways plane prepares to land at Bangkok's Suvarnabhumi Airport, Thailand, in this December 2, 2015 file photo. (Photo by Athit Perawongmetha/Reuters)





Republican U.S. presidential candidate Donald Trumps plane takes off from a campaign rally on Super Tuesday in Columbus, Ohio March 1, 2016. (Photo by Aaron Josefczyk/Reuters)





A plane flies over the setting sun in the sky at Beijing International Airport, China, March 2, 2016. (Photo by Kim Kyung-Hoon/Reuters)





A US Lockheed P-3 Orion variant, the P-3AEW&C, is seen after it took off from Tocumen international airport during an organized media visit in Panama City March 8, 2016. (Photo by Carlos Jasso/Reuters)





Malaysia Airlines Boeing 777 plane with registration number 9M-MRO flies over Poland in this February 5, 2014 file photo. (Photo by Tomasz Bartkowiak/Reuters)





A passenger aircraft makes its landing approach towards Heathrow Airport above Richmond Park in west London, Britain, March 4, 2016. (Photo by Toby Melville/Reuters)





A passenger aircraft makes its landing approach at dusk at Heathrow airport in west London, Britain, March 7, 2016. (Photo by Toby Melville/Reuters)





A man gives directions to a cargo aircraft after it landed at Tocumen international airport during an organized media visit in Panama City March 8, 2016. (Photo by Carlos Jasso/Reuters)





A B-1B Lancer strategic bomber takes off from Ellsworth Air Force Base, in support of Operation Odyssey Dawn in Libya, in this U.S. Air Force file handout photo dated March 27, 2011. (Photo by Staff Sgt. Marc I. Lane/Reuters/U.S. Air Force)





A Boeing 777-300 ER of Garuda Indonesia airplane is seen at Hangar 2 of PT Garuda Maintenance Facility (GMF) at Soekarno-Hatta airport near Jakarta, Indonesia, March 19, 2016. (Photo by Reuters/Beawiharta)





A U.S. Air Force Boeing C-17A Globemaster III large transport aircraft flies over a minaret after taking off from Incirlik air base in Adana, Turkey, in this August 12, 2015 file photo. (Photo by Murad Sezer/Reuters)





Two F-22 Raptor fighter jets from the 3rd Wing at Joint Base Elmendorf-Richardson, Alaska, conduct approach training, in this U.S. Air Force picture taken March 24, 2016. (Photo by Justin Connaher/Reuters/U.S. Air Force)





The first plane takes off from Brussels Airport, which partially re-opened following a bomb blast 12 days ago, in Zaventem, Belgium April 3, 2016. (Photo by Benoit Doppagne/Reuters)





A Delta Airlines commercial airplane taxis after it landed at the Paris Charles de Gaulle Airport in Roissy, France, in a January 26, 2016 file photo. (Photo by Jacky Naegelen/Reuters)





Participants of a guided airport tour watch an Airbus A380-841 airplane of Singapore Airlines taking off from Zurich airport, Switzerland, April 14, 2016. (Photo by Arnd Wiegmann/Reuters)