Wester - #26
Standing L-R: Peterson, Edward (P); Gacek, Walter (CP); Winham, Clifford (B); Geering, Nathan (N)
Kneeling L-R: Rodecker, Leo (NG); Weaver, Arthur (BG); Yancey, Herbert (RWG); Boffalo, Edward (TTG); Johnson, John N. (LWG); Krivitsky, Morris (TG)
The above information comes from the Peterson crew #26. Peterson was killed while checking out Bennett on 22 May 1944. This left his crew without a pilot.
Wester was the co-pilot on the Grimm crew #35 until 26 May 1944 when he was checked out by Marian Mixson. Wester was then assigned as the pilot for the Peterson crew #26.
From the Grimm crew #35 photo
Lt. Robert G. Wester