All of the above. There is a lot of history to be seen, and some tears to be shed. I have three friends whose names are on the Viet Nam memorial wall. If you are there Monday, DJT.
Call your Congressman's office, and ask to get a tour of the capitol building. It's free, and will be conducted by their staffer most of the time. It's an excellent experience, and a very good way to build a contact in your Congressman's office.
We were there right after the new year. We visited the Air and Space Museum. I was pretty impressed. They do have a new exhibit ready to open up. Not sure when that will be, looked very close from what I could see.