Airman 1st Class Natalie Powell, a 1st Combat Camera Squadron combat broadcaster, is hoisted up on a UH-60 Black Hawk medevac helicopter during a training evacuation at Fort McCoy, Wisc., on June 12, 2015. (Andrea Salazar/U.S. Air Force)

A U.S. Air Force B-52H Stratofortress leads a flight of four Swedish JAS-39 Gripens on June 11, 2015, during a Baltic Operations 2015 mission over the Baltic Sea. The aircraft took part in multiple missions throughout the exercise, including Mk-62 Quickstrike mine drops and naval support functions. (Courtesy of Swedish armed forces)

Airman 1st Class Curtis Doherty, a 374th Maintenance Squadron aircraft metals technology journeyman, welds a post hole for a B-1B Lancer platform at Yokota Air Base, Japan, on June 23, 2015. (David Owsianka/U.S. Air Force)

Retired Staff Sgt. Nicholas Dadgostar, an Air Force wounded warrior athlete, practices his backstroke during the Warrior Games Training Camp at Eglin Air Force Base, Fla., on June 18, 2015. (Maureen Stewart/U.S. Air Force)

A pilot flying a F-15E Strike Eagle from Mountain Home Air Force Base, Idaho, looks over as a KC-135 Stratotaker from Fairchild AFB, Wash., prepares to refuel it during a mission on June 25, 2015, over the Inland Northwest. (Veronica Montes/U.S. Air Force)

Tech. Sgt. Robert Barnes, 325th Communications Squadron quality assurance NCO in charge, holds the U.S.flag on June 26, 2015. Barnes had a re-enlistment ceremony 70 feet under water. (Sergio A. Gamboa/U.S. Air Force)

A CV-22B Osprey assigned to the 7th Special Operations Squadron lands after participating in an exercise on June 25, 2015, at RAF Mildenhall, England. The exercise provided airmen from the 321st Special Tactics Squadron to train and remain certified. (Victoria Taylor/U.S. Air Force)