These four crewmen, Tibbets, Pearson, Zirk and Ferebee, often made public appearances. There is a nightmarish, creepy quality to it. Notice the deadpan, very scripted speach and actions of the people. Also, he seems very tense until he says the word 'fairyland', and then he seems to relax a bit.
He calls the atomic bomb a 'fairyland' project. Listen carefully to the general who speaks first.