The Only Two...

The Enola Gay was reassembled from storage and put on permanent display at the Udvar-Hazy museum in 2003.

When I visited in November of 2015, the way it was displayed made it nearly impossible for me to frame the entire aircraft in a photo from the floor. It's pretty crowded in there.

On the other hand, you can't help but come nose-to-nose with the only other aircraft to have dropped an atomic bomb in anger. Round the corner in the World War II gallery in the USAF Museum and Bockscar is right there up in your grille.