A Lancaster bomber has performed a flypast over Derwent reservoir, 70 years on from the historic World War II raid on German dams.
Hundreds of onlookers gathered near the dam - one of the practice sites pilots used ahead of their top-secret mission.
More than a third of the men never returned from the raids, which required them to fly 60ft above ground.
The RAF Battle of Britain Memorial Flight and 617 Squadron flew over the dam in Derbyshire's Hope Valley.
Only three of the 133-strong squadron are still alive. Ninety-four-year-old Les Munro is the only surviving pilot.
More than 1,300 people were killed when the bombs hit German dams and flooded the Ruhr valley.
Hundreds of onlookers gathered near the dam - one of the practice sites pilots used ahead of their top-secret mission.
More than a third of the men never returned from the raids, which required them to fly 60ft above ground.
The RAF Battle of Britain Memorial Flight and 617 Squadron flew over the dam in Derbyshire's Hope Valley.
Only three of the 133-strong squadron are still alive. Ninety-four-year-old Les Munro is the only surviving pilot.
More than 1,300 people were killed when the bombs hit German dams and flooded the Ruhr valley.