A Blackhawk helicopter flies over Kabul October 3, 2014. (Photo by Dan Kitwood/Reuters)





A Lockheed Martin F-35B Lightning II joint strike fighter flies toward its new home at Eglin Air Force Base, Florida in this U.S. Air Force picture taken on January 11, 2011. (Photo by Staff Sgt. Joely Santiag/Reuters/U.S. Air Force)





Boeing's KC-46 aerial refueling tanker conducts receiver compatibility tests with a U.S. Air Force C-17 Globemaster III from Joint Base Lewis-McChord, in Seattle, Washington, U.S., July 12, 2016. (Photo by Christopher Okula/Reuters/U.S. Air Force)





A U.S.Marine Corps F-35B joint strike fighter jet conducts aerial maneuvers during aerial refueling training over the Atlantic Ocean in this undated picture released August 20, 2015. The Marine Corps' F-35B model can take off from warships and aircraft carriers and land like a helicopter. (Photo by Reuters/US Marine Corps)





An Airbus A400M military aircraft participates in a flying display during the 51st Paris Air Show at Le Bourget airport near Paris, France, June 16, 2015. (Photo by Pascal Rossignol/Reuters)





A Norwegian Air Force F-16 fighter plane patrols over the Baltics during a NATO air policing mission from Zokniai air base near Siauliai, Lithuania, May 20, 2015. (Photo by Ints Kalnins/Reuters)





A B-52 bomber is watched by a group of curious onlookers as it lands at RAF Fairford, February 21, 1999. The B52s arrived from the U.S.A. as part of NATO's preparations for air attacks on Yugoslavia as tensions in the Kosovo crisis increased. (Photo by Dylan Martinez/Reuters)





A Philippine Air Force attack helicopter fires a rocket as they continue to assault the Maute group in Marawi City in southern Philippines May 29, 2017. (Photo by Erik De Castro/Reuters)





A pair of B-1B Lancer bombers soar over Wyoming in an undated file photo. (Photo by Staff Sgt. Steve Thurow/Reuters/U.S. Air Force)





This Thursday, December 29, 2016 photo shows Israeli Air Force F-15 plane fly during a graduation ceremony for new pilots in the Hatzerim air force base near the city of Beersheba, Israel. Anti-aircraft missiles were launched from Syria into Israeli-controlled territory early on Friday, following a series of Israeli airstrikes inside Syria, the Israeli military said. The military said its warplanes struck several targets in Syria and were back in Israeli-controlled airspace when several anti-aircraft missiles were launched from Syria toward the Israeli jets. (Photo by Ariel Schalit/AP Photo)





Boeing's KC-46 aerial refueling tanker conducts receiver compatibility tests with a U.S. Air Force C-17 Globemaster III from Joint Base Lewis-McChord, in Seattle, Washington, U.S., July 12, 2016. (Photo by Christopher Okula/Reuters/U.S. Air Force)





In this February 27, 2017, photo an F-15E Strike Eagle from Seymour Johnson AFB in North Carolina flies out of the nicknamed Star Wars Canyon turning toward the Panamint range over Death Valley National Park, Calif. Military jets roaring over national parks have long drawn complaints from hikers and campers. But in California's Death Valley, the low-flying combat aircraft skillfully zipping between the craggy landscape has become a popular attraction in the 3.3 million acre park in the Mojave Desert, 260 miles east of Los Angeles. (Photo by Ben Margot/AP Photo)





South African National Defence Force and Air Force helicopters show skills and capability during a military training exercise at Roodewal Air Force base on June 1, 2017, in the Limpopo Province, South Africa. (Photo by Mujahid Safodien/AFP Photo)