Before Fred Kalfon began exercising at the Grey Team veterans center a couple months ago, the 81-year-old rarely left his Florida home.
Parkinson's disease, an inner ear disorder and other neurological problems, all likely caused by the Vietnam vet's exposure to the infamous defoliant Agent Orange, made it difficult for him to move. His post-traumatic stress disorder, centering on the execution of a woman who helped his platoon, was at its worst.
