Sorry if someone has asked this - - I'm a little late to the party. Are there video cameras in the rooms at the National Archives? If so, I think someone may have been on "candid camera"!
I think there must be cameras. The atmosphere is very controlled.
I was only doing research on some unclassified historical information about the search for atomic materials and scientists at the end of WWII.
Berger seems to have been reading classified documents. I think he was supposed to select documents for the 9-11 Commission to have.
Taking the documents isn't an accident, but he may just have wanted to write up his report with access to the documents rather than just notes. The whole proceedure at the archives is very time-consuming. You have to wait a long time to get the file, time is limited, you can't eat or drink anything. If you have tons of work to do this is difficult.
Perhaps a reporter will go to the archives and find out the current proceedures.