Dive Mates Filmmaker James Cameron, left, and Don Walsh meet by the Trieste at the National Museum of the U.S. Navy in Washington, June 10, 2013. Walsh piloted the Trieste, a deep-diving research vessel, to the deepest-known part of the earth's oceans, the Challenger Deep in the Marianas Trench near Guam on Jan. 23, 1960. Cameron was the third person to reach the Challenger Deep, on March 26, 2012, when he piloted the Deepsea Challenger. SHARE IMAGE: Download Image: Small (81.92 KB)| Medium (143.36 KB)| Full Size (1.33 MB) Photo By: Navy Petty Officer 1st Class Gina K Morrissette VIRIN: 130610-N-WE887-004C.JPG Photo Gallery