Barack Obama: “Education is a key tool for economic opportunity.”

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

Your task is not to impose litmus tests.

It shows me somebody who’s not focused on the American people and the job they’re supposed to do.

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