I was assigned to SAC when I was in the AF in the late 60's to 1970. I worked around B-52 and KC-135 crews all the time. They were all really good guys (all guys in those days), very nonpretentious and easy going, unlike the officers that worked in the headquarters and offices ect. (dayworkers as we called them). If I remember correctly a KC-135 crew consisted of a pilot, co-pilot,and navagator who were all officers and a boom operator who would be an NCO. I flew on a 135 to Guam and back. Not what you would call first class in fact it would be hard to call it cattle class.
Harpo