Federal air marshals take control of the situation after a man threatened passengers onboard a plane during Arctic Fencing Inter-Agency Arrow 2010 field training exercise, Elmendorf Air Force Base, Alaska, May 26, 2010. During this exercise Department of Defense, Department of Justice and Department of Homeland Security personnel worked together to resolve a simulated terrorist hijacking of a commercial aircraft from the initial in flight tactical response until the aircraft was safely escorted to the airport and secured by agents on the ground. (U.S. Air Force photo/Staff Sgt. Brian Ferguson)