Barack Obama: “I call upon the citizens of our Nation to pray, or otherwise give thanks, in accordance with their own faiths and…”

They're meant to remind us of who we can be, to remind us of what's possible, so we can forge ahead.

In forming our union, the founders fell terribly short of the Declaration's promise, leaving slavery intact, allowing states to restrict the franchise to white men who owned property.

It's a way to honor her trailblazing leadership, and inspire visitors to follow in her footsteps.

helped lead some of the most significant movements for change in human history