Russian air force Su-27 Flanker aircraft lands after the first day of Vigilant Eagle

A Russian air force SU-27 Flanker aircraft lands after the first day of exercise Vigilant Eagle in Petropavlovsk-Kamchatsky, Russia, Aug. 8, 2011. Vigilant Eagle is an annual joint anti-terrorism exercise between the Russian air force, the Federal Aviation Administration and the North American Aerospace Defense Command that trains personnel to respond to an air terrorism threat that crosses international boundaries.