Picture this: a person must show a photo ID, obtain a researcher ID card, and fill out a form telling what they're interested in looking at and the reason. Pens are forbidden, pencils provided. Each scribbled piece of paper is checked and then stamped. Cell phones and jackets go into lockers. Prying eyes make sure nothing precious walks off.
Does this sound like a military base? No, it is the U.S. National Archives.