Rep. Rob Woodall of Georgia (left) and Rep. Chris Stewart of Utah listen as retired Navy Capt. Jerry Rovner explains details of the International Human-Powered Submarine Races in the 1,886-foot long deep-water basin at Naval Surface Warfare Center, Carderock Division in West Bethesda, Md., June 26, 2017. More than 20 teams from around the world race their one-and two-person human-propelled submarines in the 14th biennial unique engineering design competition, one of the oldest STEM events in the Department of Defense. ( Navy photo by Devin Pisner/Released)

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