California gunman's life was both unremarkable and troubled

THOUSAND OAKS, Calif. (AP) — At first, the outlines of the mass shooter's 28 years appeared unremarkable.Ian David Long enlisted in the Marines out of high school and married at 19. Within five years, he was honorably discharged, divorced and in college.As the picture sharpened, troubling details emerged — the kinds of clues that, in hindsight, make people wonder out loud whether the impulse that led Long to kill 12 people at a country music bar had been forming in plain sight.Neighb