Capt. Don Walsh, PhD, USN Ret., who with Jacques Piccard on Jan. 23, 1960, became the first humans to make it to the deepest known point on earth — 35,797 feet beneath the Pacific Ocean’s at the Challenger Deep — aboard the bathyscaphe Trieste discusses the importance of deep sea exploration with Defense & Aerospace Report Editor Vago Muradian at the National Museum of the United States Navy at the Washington Navy Yard before a ceremony commemorating the 60th anniversary of the mission.