Barack Obama: “That’s how America got built.”

The success of this experiment was never a given.

We designed the center not to be some lifeless mausoleum.

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…