(NewsNation) — For Melissa “Rowdie” McMahon, the call to serve is in her blood. Her grandfather served in the Army during World War II. Her father served, as well. So, when it was her turn, Rowdie joined the Air Force as a nurse, deploying to Afghanistan in 2015 to 2016 to care for injured Americans. “Within the first day of being there, we got rocketed,” she said. A back injury eventually brought her home. But the battle waiting for her there was one she never saw coming.