Barack Obama: “Neil was among the greatest of American heroes—not just of his time, but of all time.”

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

There’s no doubt that we are going through a period right now of disruption, polarization.

Of course, we did not accomplish everything we set out to do. No administration does. Some of the exhibits reflect unfinished business, in some cases, my own shortcomings and mistakes, in some cases because - as a sign I kept on the…

the American people want to find a way to turn towards each other again, not further away"