Petty Officer 2nd Class Justin Vaughn, an operations specialist from Sector Seattle, receives a certificate of completion during the closing ceremony of the Mangudai three-day challenge and officially becomes a Mangudai Warrior, May 3, 2013. According to legend, Mangudai warriors were chosen for their war fighting skills as well as their ability to thrive under harsh and ambiguous conditions; to be a member of the Mangudai was to be a member of an elite fighting force. (U.S. Coast Guard photo by Seaman Crystal Saladino)