Captain Don Walsh, USN (Ret), PhD, was well known in oceanographic circles as one half of the team (partnered with Jacques Piccard) that descended 35,840 feet down at Challenger Deep in the Mariana Trench in the U.S. Navy's bathyscaph Trieste in 1960. While there was significantly more to his life, the remarkable Trieste story is still told as one of the greatest oceanographic achievements. "The Trieste experience was a life-changing event," Don said. "One that opened many doors and firmly established my lifelong attitude about opportunity - to seize it when and wherever it was encountered."