TUCSON, Ariz. (KGUN 9) — Casey Alexander was serving as a sniper in Iraq when a Christmas Eve explosion in 2007 changed the course of his life. Now, 20 years later, he is still fighting for recognition of the injuries he says that blast caused, and his wife says the battle has never really ended for their family. "Like when people say, what do you want to do with your life, I can honestly say I already did it. Like I've accomplished it.