Petty Officer 2nd Class Tyler Gagnon, a maritime enforcement specialist with the Coast Guard Maritime Force Protection Unit, leaps over the swinging log obstacle at Joint Base Lewis-McChord, Wash., May 1, 2013. The Army invited members of the Coast Guard to participate in their Mangudai challenge that confronts senior enlisted personnel with different obstacles that can sometimes last up to 72 hours. (U.S. Coast Guard photo by Petty Officer 3rd Class Jordan Akiyama)