WW II heaviest bomb ever built.
The Grand Slam was a 22,000 lb earthquake bomb used by RAF Bomber Command against strategic targets during the Second World War.
Designed: 1943 Blast yield: 6.5 tons TNT equivalent.
Filling weight: 4,144 kg (9,136 lb). Total Weight: 22,000 lb (10,000 kg) Produced: 1944–45