Once again, Duke had his choice of assignments, and chose the 526th Fighter-Interceptor Squadron at Ramstein Air Base in West Germany. This was at the height of the Cold War, and tensions ran high, especially during the Berlin Crisis of 1961. Duke chose the assignment precisely because it was the front line. Four of the 526th's F-86 (and later F-102 Delta Dagger) fighter-interceptors were always on alert, ready to scramble and intercept aircraft crossing the border from East Germany.