Master Chief Jason Vanderhaden, 13th Coast Guard District command master chief, is given assistance by members of the Army as he pulls himself up the recon tower during the Mangudai challenge on Joint Base Lewis-McChord's obstacle course, May 1, 2013. The Mangudai is an Army event that can last up to 72 hours and is meant to test its challengers physically, mentally and emotionally. (U.S. Coast Guard photo by Petty Officer 3rd Class Jordan Akiyama)