"Royal Air Force 1939-1945- Bomber Command" A Lancaster crew from No 57 Squadron have safely returned from an operation and now await interrogation. The bomb aimer, Sergeant 'Bert' Turkentine (left) and the Canadian navigator, Sergeant 'Muse' Music, are offered welcoming cups of tea by an attentive WAAF. This image was part of a sequence taken for an Air Ministry picture story entitled 'T for Tommy Makes a Sortie', which portrayed the events surrounding a single Lancaster bomber and its crew during a typical operation.