Barack Obama: “Mr. Donilon expressed appreciation for Japan's support for Afghanistan.”

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

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

That's what I hope every visitor to this center takes away from their experience.

A belief that our military and law enforcement owe allegiance not to any president or political party, but to the people and our constitution … a belief in the peaceful transfer of power