MOUNTAIN HOME AIR FORCE BASE, Idaho - U.S. Navy Airman Robert Williams, Electronic Attack Squadron VAQ-137 “The Rooks” from Naval Air Station Whidbey Island, Wash., performs post-flight checks on a EA-18G Growler at Mountain Home Air Force Base, Idaho, Sept. 30, 2013. The Rooks joined fellow Sailors, Airmen, Marines, Soldiers, Canadians and Germans for exercise Mountain Roundup 2013, which takes place in Idaho from Sept. 30 through Oct. 19, 2013.