Maria Greenfield poses with SCUBA gear near her backyard swimming pool in Norman on July 13, 2011. Greenfield lost both her legs when she was hit by a car in Tulsa when she was 19. She currently works as an occupational therapist at the J.D. McCarty Center in Norman and is a SCUBA instructor who has taught the sport to Wounded Warriors. JEFF LAUTENBERGER/Tulsa World

Maria Greenfield works in her office at the J.D. McCarty Center in Norman on July 13, 2011. After starting as an intern, she is now Director of Occupational Therapy at the center. JEFF LAUTENBERGER/Tulsa World

Maria Greenfield holds the hand of 10-year-old Jason Smith while helping him write on a chalkboard at the J.D. McCarty Center in Norman on July 21, 2011. JEFF LAUTENBERGER/Tulsa World

Maria Greenfield works in therapy with Kaydyn Buckley, 2, a down syndrome patient at the J.D. McCarty Center in Norman on July 21, 2011. Greenfield decided to practice therapy with children instead of adults. JEFF LAUTENBERGER/Tulsa World

Donning her scuba gear, Maria Greenfield goes under in her pool to look for a lost earring. On her first scuba lesson, Greenfield said her instructor was hesitant to teach, but Greenfield completed all the requirements without difficulty. JEFF LAUTENBERGER/Tulsa World

Maria Greenfield is helped out of her pool by husband Greg after she damaged the foam heel on her swimming legs. Greenfield lost both her legs when she was hit by a car at 19 years old in Tulsa.JEFF LAUTENBERGER/Tulsa World