A U.S. Air Force F-22 Raptor stealth fighter jet takes off from the runway during their military exercise at the Osan U.S. Air Base in Pyeongtaek, south of Seoul, South Korea, Wednesday, April 3, 2013. (Photo Source: chinanews.com)

Two U.S. Air Force F-22 Raptor stealth fighter jets wait to take off during a military exercise at the Osan U.S. Air Base in Pyeongtaek, south of Seoul, South Korea, Wednesday, April 3, 2013.  (Photo Source: chinanews.com)

Two U.S. Air Force F-22 Raptor stealth fighter jets wait to take off during a military exercise at the Osan U.S. Air Base in Pyeongtaek, south of Seoul, South Korea, Wednesday, April 3, 2013. (Photo Source: chinanews.com)