An A400M cargo aircraft performs for a crowd of industry professionals and media members during the Paris Air Show at Le Bourget Airport, France, on Tuesday, June 16, 2015. The event is expected to bring in 315,000 people, 2,215 companies and 150 aircraft. (Ryan Crane/U.S. Air Force)

Members of the Air National Guard and the 129th Security Forces Squadron participate in confrontation management training at Moffett Federal Airfield, Calif., on June 7, 2015.The event was part of the 129th's annual training requirements. (Kim E. Ramirez/U.S. Air National)

A C-130J Super Hercules passes behind a Latvian military member during a combined jump day on June 15, 2015, at Lielvarde Air Base, Latvia. More than 70 U.S. Air Force, U.S. Army and Latvian servicemembers participated in a jump day during exercise Saber Strike 15. (Armando A. Schwier-Morales/U.S. Air Force)

Senior Airman Christopher Fantasia, a tactical air control party airman with the New Jersey Air National Guard's 227th Air Support Operations Squadron, provides security during Operation Morning Coffee on June 16, 2015, at Warren Grove Gunnery Range, N.J. (Amber Powell/U.S. Air Force)

U.S. Air Force Tech Sgt. Steven Digby, left, and Senior Airman Ashanti Lane, assigned to the 71st Aerial Port Squadron, push a pallet onto a C-130 Hercules aircraft during the 25K Halverson driving and loading course at the Port Dawg Challenge, Dobbins Air Reserve Base, Ga., on June 16, 2015. (Stephen Schester/U.S. Air Force)

Members of the 420th Air Base Squadron, Ministry of Defence Police and 436th Air Wing, prepare the C-5 Super Galaxy for cargo unloading, on June 2, 2015, at RAF Fairford, United Kingdom, in support of the U.S. European Command Exercises BALTOPS 15 and SABER STRIKE 15. (Chrissy Best/U.S. Air Force)

U.S. airmen push down on the wing of a U-2 Dragon Lady after its landing at RAF Fairford, United Kingdom, on Tuesday, June 9, 2015. If the aircraft lands slightly off balance, it has the potential to tilt to one side or another. (Jarad A. Denton/U.S. Air Force)