Sir Barnes Neville Wallis was an English engineer and inventor. He is best known for having invented the bouncing bomb used by the Royal Air Force in Operation Chastise to attack the dams of the Ruhr
Wallis as a sub-lieutenant in the Royal Naval Air Service
The Möhne Dam, breached by bouncing bombs
Valentin U-boat pen, with its roof of 4.5 m (15 ft) of reinforced concrete blown open by a Grand Slam bomb
The earthquake bomb, or seismic bomb, was a concept that was invented by the British aeronautical engineer Barnes Wallis early in World War II and subsequently developed and used during the war agains
A Grand Slam bomb being handled at RAF Woodhall Spa in Lincolnshire
RAF ground crew handling the Tallboy that was later dropped on the La Coupole V-weapon site at Wizernes, France, in 1944