Airman 1st Class Tyler Bertapelle, 391st Aircraft Maintenance Unit crew chief, Mountain Home Air Force Base, Idaho, checks for leaks on an F-15 Strike Eagle during a pre-flight inspection on Osan Air Base, Republic of Korea, Aug. 15, 2014. The unit prepares and maintains the F-15 Eagle to ensure mission success. (U.S. Air Force photo by Senior Airman David Owsianka/Released)