Lieutenant colonel Greg Gadson is not only an actor in one of this Summer's biggest action movies, he is a real American hero. In 2007, while the decorated Army commander was stationed in Iraq and returning from a memorial service for two fellow soldiers, his car was hit by a roadside bomb. He lost both his legs in the accident and his right arm and hand were severely damaged. Since then, Greg's story of recovery and triumph over challenge has become an inspiration to many, and he's shared his journey with thousands of people as both a public speaker and the director of the US Army's Wounded Warrior program. Battleship director Peter Berg was among those touched by Greg's experience, and made it his mission to track him down for the role of Lieutenant Colonel Mick Canales in the film. The first-time actor didn't shy away from the challenge and, when we sat down with him at a recent press day for the film, he told us he even requested to do his own stunts. Hear more about Greg's remarkable story in our interview and see him in action when Battleship hits theaters May 18!