Visited DC yesterday. Went to a place called the Newseum. Pretty cool place. Among the many items there was the Unabombers cabin.
They also had his original typed manifesto. Note he heated with a wood stove.
They also had the antennae from the top of the world trade center, landing gear and engines from one of the planes, documents the hijackers carried, etc.
Worth the time if you are ever in the belly of the beast.