So, on last night's epiosde they showed Booth & Brenth get stuck in an old fashinoned elevator as they were heading upstairs to the lab in the Jeffersonian. Here is a little know secret about the Library of Congress - we have a similar old fashioned elevator. This elevator is for staff to go down to the stacks in the Adams Building with a cart. We have too push the gates open before opening the doors. It is hidden from the public and it still works well.