"'A long walk in the mountains,' Haver said was her breaking point. 'It felt like we had walked, seriously, for a 24-hour period.' She kept going, motivated by thoughts of her platoon at Fort Carson, who she said she didn't want to let down. Ranger School got Calderon thinking he'd made the wrong career choice. 'I almost convinced myself that I didn't have to be in the Army anymore,' he said."