I would call ahead and see what is open. You may be able to catch Pres Bush do a speak with it being Veterans day, but that would be when it is observed on Monday.
Holocaust Museum. (You will spend 2-3 hours here.)
www.ushmm.org
Intl Spy Museum (close to White House)
www.spymuseum.org
Botanical Gardens (at Capital Hill)
www.usbg.gov
You are too late to take the White House Tour, as it takes 3 - 6 months to register and go through the security checks.