Guy Gibson (centre) was posted on 21 March 1943 to command the newly-formed No. 617 Squadron RAF at Scampton, Lincolnshire
617 Squadron practise dropping the 'Upkeep' weapon at Reculver bombing range. Dr Barnes Wallis is on the extreme left of the group.
Wing Commander Guy Gibson (in door of aircraft) and his crew board their Avro Lancaster bomber for No. 617 Squadron's raid on the Ruhr Dams, 16 May 1943.
Aerial reconnaissance (vertical) photograph showing the breach in the Mohne Dam caused by No 617 Squadron, Royal Air Force's raid on 16 May 1943.
Surviving members of 617 Squadron (except those who had gone to bed) stand at the entrance of the Officers' Mess at Scampton, Lincolnshire, after breakfast
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An important part in the production of the 25 pounder gun is the hardening and tempering process. After machining, the gun barrel is heated to a specified temperature for hardening in a vertical electric furnace. It is then withdrawn and lowered into an oil quenching bath after which it is tempered. This photograph shows the barrel being slowly lowered into the quenching bath.
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