The National Constitution Center, the site of the speech, announced it will mark the anniversary 'by launching a virtual exhibit online. The interactive website and supplemental educational materials will provide users with a deeper understanding of this important speech. The interactive webpage [launches tomorrow] will ... contain full video of President Obama's speech, A More Perfect Union, with a chapter index and a scrolling transcript to make it easy for users to follow along. The page will also feature quotes from media personalities and historians about the significance of the seminal speech, including audio of historian Harold Holzer comparing Lincoln's historic Cooper Union speech and Obama's Race Speech at the Constitution Center; press materials; and an image gallery of photographs from the event and of the Center's signed copy of the speech.'