Britain's Red Arrows airplane display team perform during D-Day commemorations in Portsmouth in southern England on June 5, 2014. Several hundred surviving veterans of the 1944 D-Day landings are commemorating the 70th anniversary of the mission on both sides of the English channel. (Photo by Carl Court/AFP Photo)

Two Extra 300 aerobatic planes fly at the ILA 2014 Berlin Air Show on May 21, 2014 in Schoenefeld, Germany. (Photo by Sean Gallup/Getty Images)

An Air China jet flies past a rainbow over Beijing Friday, June 6, 2014. (Photo by Alexander F. Yuan/AP Photo)

Kirby Chambliss of the U.S. flies in formation with Matt Hall of Australia, Yoshihide Muroya of Japan and Nigel Lamb of Britain prior to the third stage of the Red Bull Air Race World Championship in front of the Petronas Towers in Kuala Lumpur May 15, 2014. (Photo by Joerg Mitter/Red Bull handout via Reuters)

Jurgis Kairys of Lithuania performs with a modified Russian Sukhoi Su-31 airplane during the Bucharest International Air Show at Baneasa airport June 22, 2014. (Photo by Bogdan Cristel/Reuters)

A Virgin Airlines commercial aircraft is illuminated by the setting sun in front of a full moon after taking off from Sydney Airport, June 12, 2014. (Photo by Jason Reed/Reuters)

An airplane flies near mountains, as the sun rises in Rio de Janeiro May 5, 2014. (Photo by Sergio Moraes/Reuters)

A woman watches as Latvia's Baltic Bees aerobatic team on L-39C Albatross airplanes, perform a maneuver during Bucharest International Air Show at Baneasa airport June 22, 2014. (Photo by Bogdan Cristel/Reuters)

German test pilot Markus Scherdel steers the solar-powered Solar Impulse 2 aircraft for its maiden flight at its base in Payerne, Switzerland, on June 2, 2014. (Photo by Denis Balibouse/Pool)

AT-3 jets fly in formation with colored smoke during a ceremony marking the 90th anniversary of Taiwan's military academy in Kaohsiung, Taiwan, Monday, June 16, 2014. (Photo by Wally Santana/AP Photo)