Stock Photo Description: U.S. Army Staff Sgt. Brian Harris checks U.S. Army National Guard paratroopers are secure before the a Canadian CH-146 Griffon helicopter takes off from Fort McCoy, Wis., July 21, 2006, during exercise Patriot 2006. Patriot, the largest joint, annual exercise held in the United States, increases the war-fighting capabilities of the U.S. Air Force and Army National Guard, reserve, and active components as well as interoperability with the participating nations of Canada, United Kingdom, and the Netherlands. The paratroopers are from 2nd Battalion, 20th Special Forces Group out of Chicago, Ill., and 116th Air Support Operations Squadron out of Fort Lewis, Wash. (U.S. Air Force photo by Master Sgt. PatrickJ. Cashin) 060721-F-1987C-010.