BILOXI, Miss. - Rick Santorum said today that if a U.S. soldier shot and killed 16 civilians, as U.S. officials have suggested, then the Afghan people deserve an apology. After an energy conference here, Santorum told reporters that the incident needs to be investigated further, calling it a "horrible situation." "If it turns out to be the case that this person did a horrible wrong and it was a deliberate act, a deliberate act by an American soldier and that is something we should clearly say was something that we should apologize for," Santorum said. "That it's not a mistake,...