Throughout the movie, the characters call Burdge "sergeant" or "sarge". Burdge is a Chief Master Sgt (E-9) and should have been called either "Chief" or "Chief Burdge" as Air Force protocol dictates. No officer or enlisted person would ever refer to a Chief as "sarge" or "sergeant"
In the opening sequence, as characters are introduced, McCracken is shown drinking from a 5 gallon water bottle made of plastic. Water cooler bottles in 1961 were made of glass, not plastic.