Centaurus High Graduate Killed During Training BOULDER, Colo. -- The family of Mario Maestas knew his life as a Navy SEAL was dangerous, but he wasn't overseas and news of his death last week in a training exercise was an unexpected blow. Maestas (pictured, left), a 22-year-old Centaurus High School graduate who grew up in Louisville, died Thursday at Fort Chaffee, Ark. Officials said his platoon was training when a live round of ammunition hit him. "We knew he had some really hard training ... we didn't expect this," said his sister, Monita, 23. Family members described Maestas as...