Porn In Our Nations Capital!

Just got back from a week in Washington D.C. (pictures to come!) and I wanted to post what happened at the Library of Congress (LoC). Throughout my research, I have discovered that the LoC has a collection of pornography in its vaults. They call it the DELTA collection. Anyone who has checked this blog before knows why its called DELTA.
Upon entering the building, I asked the man at the information desk about the collection. He was an older man, probably in his late 60's or so. Initially I asked him simply about the Delta Collection. He had no idea what I was talking about and asked me what it was. I told him bluntly that it was a porn collection. At first he thought I said "ports" (as in shipping ports!). I reconfirmed my question and he said that he didn't know of the collection. I do admire him as he treated me with respect and didn't tell me to get lost.
So with disappointment, I said thank you and went into the LoC. About 20 minutes later as we (my 2 year old was having a tantrum, so we left early) were leaving, the gentleman stopped me and said that he had checked with someone else in the LoC, and that the Delta Collection DID indeed exist. He told me that I had to get a "Special Permit" to view it and that it was located in another building. He said that I would have to limit my "research" (his word...LOL!) to that building. He then said that it was the largest collection of pornography in the country (the look on his face was priceless!)
For the brief time that we were in DC, it was too complicated to get the permit, so I never actually saw the collection, but according to the old fella, it is indeed there!