150723-N-SD120-014 OKINAWA, Japan (July 23, 2015) Airman 1st Class Tom Clark, assigned to the Air Force 18th Civil Engineering Squadron, guides Equipment Operator 3rd Class Patrick Heng, a Seabee assigned to Naval Mobile Construction Battalion (NMCB) 5, as he uses a loader to fill a crater during an airfield damage repair joint contingency training exercise at Kadena Air Base. (U.S. Navy photo by Mass Communication Specialist 1st Class John P. Curtis/Released)