Can TSA employees spot irony?

As I went through "security" at Dulles yesterday, I noticed a book sitting on top of the X-ray machine. George Orwell's 1984, to be precise. I wanted to take a picture, or to ask the TSA folks about it, but was late for my flight and didn't feel like missing it by being branded a terrorist.

Was it put there by a TSA employee? If so, did they recognize the irony?