U.S. Air Force Senior Airman Dino Parrella, 65th Civil Engineer Squadron, ensures bolts are safe after completing the Airfield Damage Repair exercise during the Silver Flag exercise on Ramstein Air Base, Germany, Aug. 1, 2009. The Silver Flag exercise gives participants the basic contingency skills to set up a bed down operation anywhere in the world. (U.S. Air Force photo by Airman 1st Class Grovert Fuentes-Contreras)(Released)