Obama listens from a back stairwell as he is introduced. It was his second or third speech of the day.

Callie Shell

"When I think about how I understand my role as citizen, setting aside being president, and the most important set of understandings that I bring to that position of citizen, the most important stuff I've learned I think I've learned from novels. It has to do with empathy. It has to do with being comfortable with the notion that the world is complicated and full of grays, but there's still truth there to be found, and that you have to strive for that and work for that." —Barack Obama

Source: Callie Shell