It is my understanding that they went back and were there for like two weeks...used it as a temporary base..
See the link posted here for a timeline:
http://www.freerepublic.com/focus/f-news/1260694/posts?page=87#87
April 18 is not on it.
Further, don't think I'm relying on the Boston Globe's timeline. I just grabbed the nearest Google find. I heard Brett Baier give the detailed timeline yesterday verified by the Pentagon.
This ABC video comes from a different facility making the story completely unrelated to the charges being leveled by Kamp Kerry (aided by the NYT, etc)