Silver Flag
Tech. Sgt. Mark Farmer and Airman 1st Class Cheston Biernacki measure the line-of-sight upheaval from a simulated blast June 28, 2011, during Silver Flag at Kadena Air Base, Japan. Sergeant Farmer is a pavement and heavy-equipment operator assigned to the 647th Civil Engineer Squadron at Joint Base Pearl Harbor-Hickam, Hawaii. Airman Biernacki is a pavement apprentice assigned to the 35th Civil Engineer Squadron at Misawa Air Base, Japan. (U.S. Air Force photo/Airman 1st Class Jarvie Z. Wallace)