Canadian Army Soldiers from the 1st Battalion, Nova Scotia Highlanders, react to a grenade during a class on proper enemy prisoner of war search procedures taught by U.S. Army Soldiers from Alpha Co., 3rd Battalion, 3rd Special Forces Group at Fort Pickett, Va., Feb. 19, 2009. The class was a component of Exercise Southbound Trooper IX, a joint venture aimed at preparing today's warfighters for success in current military operations.