At American History, the transportation exhibit just re-opened, and there's a new display of NYT photos from the 50s ("The Tumultuous Fifties: A View From the New York Times Photo Archives").

The Post's Weekend Section has a complete listing of all exhibits - both permanent and temporary - that you could scan to see if anything sounds especially interesting. http://www.washingtonpost.com/wp-dyn...2004Mar11.html (I think registration may be required these days; personally, I'm trying to get everyone I know to be from Whittier, AK - 99693 - just to make things interesting)