The most heated public moment occurred during McClellan's off-camera "gaggle" with White House reporters yesterday morning. It featured NBC's David Gregory, one of McClellan's most persistent inquisitors over the last year, who raised his voice while asking a question about the incident. "Hold on," McClellan interrupted, pointing out that "the cameras aren't on right now. You can do this later." "Don't accuse me of trying to pose to the cameras," Gregory replied. "Don't be a jerk to me personally when I'm asking you a serious question." "You don't have to yell," McClellan said. "I will yell," said Gregory, jabbing his...