Petty Officer 2nd Class Ryan Rivera, a machinery technician from Coast Guard Cutter Wahoo, and Petty Officer 2nd Class Tyler Gagnon, a maritime enforcement specialist from Maritime Force Protection Unit in Bangor, Wash., lead members of the Army and Air Force in a 12-mile march to the final event of the three-day Mangudai leadership challenge, May 3, 2013. Members participating in Mangudai marched for a total of 29 miles in three days enduring full combat gear, little food and sleep and various stress inducing events. (U.S. Coast Guard photo by Seaman Crystal Saladino)