Russian KA-27 Helix helicopter lands on the flight deck of the aircraft carrier USS Nimitz (CVN 68) following a photo exercise as part of Rim of the Pacific (RIMPAC) 2012. Twenty-two nations, more than 40 ships and submarines, more than 200 aircraft and 25,000 personnel are participating in the biennial Rim of the Pacific (RIMPAC) exercise from June 29 to Aug. 3.