Barack Obama: “A nuclear-armed Iran is unacceptable, and all elements of American power are on the table to prevent Iran from obtaining…”

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…

For almost four decades, Nancy Pelosi served the American people and worked to make our country better.

And there’s no reason to suggest that we can’t get through this one either.

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