I was lucky enough to make it to the concert today. From PE Obama's speech (full text):
What gives me that hope is what I see when I look out across this mall. For in these monuments are chiseled those unlikely stories that affirm our unyielding faith -- a faith that anything is possible in America. Rising before us stands a memorial to a man who led a small band of farmers and shopkeepers in revolution against the army of an Empire, all for the sake of an idea. On the ground below is a tribute to a generation that withstood war and depression -- men and women like my grandparents who toiled on bomber assembly lines and marched across Europe to free the world from tyranny's grasp. Directly in front of us is a pool that still reflects the dream of a King, and the glory of a people who marched and bled so that their children might be judged by their character's content. And behind me, watching over the union he saved, sits the man who in so many ways made this day possible.
And yet, as I stand here today, what gives me the greatest hope of all is not the stone and marble that surrounds us today, but what fills the spaces in between. It is you -- Americans of every race and region and station who came here because you believe in what this country can be and because you want to help us get there.
[...] But never forget that the true character of our nation is revealed not during times of comfort and ease, but by the right we do when the moment is hard. I ask you to help reveal that character once more, and together, we can carry forward as one nation, and one people, the legacy of our forefathers that we celebrate today.