Two B-17 Flying Fortresses of the 94th Bomb Group fly together during a mission over Gelsenkirchen. Printed caption on reverse: '26744 - Gelsenkirchen, Germany, 27 miles west of Dortmund, on the Duisberg-Hamm railway has several times been the target of missions of the U.S. Army 8th Air Force, out to blast Nazi communications into nothingness. Here are two photos of a recent raid. Thunderbolt, P-47, the 8-gun fighter of the U.S. Army Air Forces, leaves a trail of frozen vapor as it flies high cover for the Flying Fortresses below on its way to bomb Gelsenkirchen Nazi rail center near Dortmund.'