Two years ago, Eric Greitens suddenly heard from a former SEAL comrade from his training class, a brother-in-arms he hadnt seen in a decade. Drew Sheets was one of the toughest of the tough, but ever since he returned home from war to his young family in a small logging town, he had been suffering. Without a sense of purpose, plagued by PTSD, and drinking heavily, he needed help. He and Eric started writing and talking, nearly every day, and Eric set down his thoughts on what it takes to live