"Royal Air Force Bomber Command, 1942-1945." A 22,000-lb MC high explosive deep-penetration bomb (Bomber Command executive codeword 'Grand Slam') is manoeuvred onto a trolley by crane in the bomb dump at Woodhall Spa, Lincolnshire, for an evening raid by No. 617 Squadron RAF on the railway bridge at Nienburg, Germany. 20 aircraft took part in the raid and the target was destroyed.