Arturo Hurtado of Richmond was still stricken with grief over the mass shooting in Newtown, Conn., that left 20 schoolchildren dead when he awoke Saturday morning. So he decided to get rid of his gun - "that darn thing," he called it - and purged it from his home. "I've got kids, man," said Hurtado, who works at Waste Management in Oakland and has children ages 14, 10, 6 and 1. "Kids are curious. Kids don't know any better. I had it locked in a toolbox, so I don't know. ... I just know it had to go." Hurtado was...