Former Navy SEAL David Goggins on how to reach your full potential Retired Navy Seal David Goggins is described as one of the toughest men on the planet. He's the only man in history to complete elite training as a Navy SEAL, Army Ranger, and Air Force Tactical Air Controller. Goggins joins "CBS This Morning" to discuss his new memoir and self-help book called "Can't Hurt Me: Master Your Mind and Defy the Odds."