Look at the people all around him. He remains cool, calm, and collected. No matter what.
Bigger versions here.
[Added] The President made some remarks shortly after this picture was taken, beginning as follows.
Good evening, everybody. Tonight, after nearly 100 years of talk and frustration, after decades of trying, and a year of sustained effort and debate, the United States Congress finally declared that America's workers and America's families and America's small businesses deserve the security of knowing that here, in this country, neither illness nor accident should endanger the dreams they've worked a lifetime to achieve.
Tonight, at a time when the pundits said it was no longer possible, we rose above the weight of our politics. We pushed back on the undue influence of special interests. We didn't give in to mistrust or to cynicism or to fear. Instead, we proved that we are still a people capable of doing big things and tackling our biggest challenges. We proved that this government -- a government of the people and by the people -- still works for the people.