190625-N-DW726-002 WEST BETHESDA, Md. (June 25, 2019) The University of Michigan moves their sub, the Bluefin, into deeper basin water in preparation for their race. The Naval Surface Warfare Center, Carderock Division is hosting the 15th International Human-Powered Submarine Races in its 3,200-foot David Taylor Model Basin in West Bethesda, Md., June 24-28, 2019. This biennial science, technology, engineering and math (STEM) event provides an avenue for high school and college teams to tackle the difficult challenges of submarine design, construction and operation. (U.S. Navy photo by James Contreras)