Barack Obama: “We are blessed when it comes to energy, but we're much more blessed when it comes to the innovation and the dynamism and…”

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

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…

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

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