NASA administrator Michael Griffin made headlines last week when he told a National Public Radio interviewer he wasn't sure global warming was a problem. "All I can really do is apologize to all you guys ... I feel badly that I caused this amount of controversy over something like this," said Griffin. The head of NASA told scientists and engineers that he regrets airing his personal views about global warming during a recent radio interview, according to a video of the meeting obtained by The Associated Press. NASA administrator Michael Griffin said in the closed-door meeting Monday at the Jet...