Operation CHASTISE: the attack on the Moehne, Eder and Sorpe Dams by No. 617 Squadron RAF on the night of 16/17 May 1943. A practice 'Upkeep' weapon attached to the bomb bay of Wing Commander Guy Gibson's Avro Type 464 (Provisioning) Lancaster, ED932/G
A practice 'Upkeep' weapon attached to the bomb bay of Wing Commander Guy Gibson's Avro Lancaster of No. 617 Squadron at Manston, while conducting dropping trials for the Dams Raid off Reculver, May 1943.