This image, snapped by White House photographer Pete Souza in the situation room during the raid on Osama bin Laden's compound on Sunday, quickly became an iconic photo for the gravity and edge-of-your-seat anxiety it captured on the faces of those assembled as they watched the action unfold (except for Joe Biden, who looks like he's scrutinizing a piece of modern art.) No expression was more powerful in that moment than Hillary Clinton's, her hand covering her mouth, as if stunned by what she was witnessing. Tell us about that moment, Hillary:
"I am somewhat sheepishly concerned that it was my preventing one of my early spring allergic coughs," she said. "So, it may have no great meaning whatsoever."