"Z Division - Operation Crossroads"

Members of the Z Division Assembly Group in the Pacific during Operation Crossroads. Seated in the front row, left to right: Phil Dailey, Kenneth O. Roebuck, Arthur Machen, Ira "Tiny" Hamilton, and Bryan Arthur. Back row, left to right: Roger S. Warner, Major Robert L. Roark, Colonel Jack Sutherland (seated), Glenn Fowler (kneeling), Alvin Van Vessem, William O. McCord, and Gene Eyster (seated).