Sgt John W. O'Brien flew 26 missions, from 02/22/1945, mission #212, to 04/19/1945, mission #253. He served as a Tail Gunner.
Sgt O'Brien served with the following crewman: 2nd Lt Richard Burdick, Sgt Ernest J. Butlin, Sgt James Fogleman, Sgt Ira A. Franzblau, Sgt Homer Fritsch, Sgt John W. Holland, Sgt Richard L. Johannes, 2nd Lt Herbert P. Levin, 2nd Lt William G. McKenny, S/Sgt George A. Pavluska, Sgt Arnold A. Siegel, Sgt Robert A. Sunderlin and Cpl George Toombs