German Bundeswehr Sikorsky CH-53 transport helicopter flying during a military exercise over Alpnach Air Base in Switzerland, with spinning rotors, extended landing gear and a clear blue sky. Poster #911834234
German Bundeswehr Sikorsky CH-53 transport helicopter flying during a military exercise over Alpnach Air Base in Switzerland, with spinning rotors, extended landing gear and a clear blue sky. Poster #911834234
