not much of it was to be preserved, because it was cheaper to put crestwood in and stuff, but lorenzo winslow, the architect, really was the hero, as far as the original things. he saved what he could. and during the clinton administration, when the blue room was being redone, and the paint was taken off, there was all that old original pine, those enormous boards, the most gorgeous thing in the world that winslow had insisted that they be put back in the house while he was there to do it and didn't have to listen to anyone else. so i don't know what percentage. you know, of course, next year is the 200th anniversary of its burning. and about 30 percent of it was torn down after that fire. but, you know, the walls are 100 percent. and what percentage is that of the house? i don't know. everything else was -- and then the subbasements were dug. and one secret one was dug, and truman ordered the park service to surrender $750,000 of its budget to do the subbasement, the one in 9/11, that the vice president was in, and it's -- >> the secure space. >> it was done secretly -- and not secur