"As has been mentioned, it was on this ground long ago that lives were once traded; where hundreds of thousands once marched for jobs and for freedom. It was here that the pillars of our democracy were built often by Black hands. And it is on this spot - alongside the monuments to those who gave birth to this nation, and those who worked so hard to perfect it - that generations will remember the sometimes difficult, often inspirational, but always central role that African Americans have played in the life of our country."
Here is video of the entire ceremony: