Last weekend, gun rights activists marched at the Alamo in San Antonio, Texas, carrying semi-automatic rifles and loaded magazines. Four days later, eighth-grader Andy Lopez was shot to death by Santa Rosa, California police for failing to drop the BB gun he was carrying to a friend's house. Men carrying AR-15s down the street, fine; boy carrying BB gun down the street, fatal? Something does not compute. In fact, the tragic killing in the second case exposes the... (GunPolicy.org)