JOINT EXERCISE The guided-missile destroyer USS Gridley and the guided-missile frigate USS Thach follows behind the Nimitz-class aircraft carrier USS Ronald Reagan, April 13, 2008, while under way in the Pacific Ocean during a joint exercise in preparation for deployment. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 664406-L-IAO30-301.jpg Photo Gallery