Secretary of Navy Fred Korth (left) announced at the Pentagon that the Navy's and successful five-month search for the sunken nuclear submarine Thresher has formally ended. He said that a vast quantity of debris but no bodies from the vessel had been located. Here, Korth exhibits a twisted piece of pipe which was picked up with a mechanical arm by the deep diving bathyscaph Trieste. At right is Lieutenant Commander Donald Keach, skipper of the Trieste. 5 September 1963