Heavy bomber version of the bouncing bomb, was used to destroy the Mohne and Eder dams by Lancasters from the specially recruited and trained 617 Squadron, often known as the Dambusters, under Wing Commander Guy Gibson. In March and April 1945, as the war in Europe was ending, Lancasters dropped Grand Slams and Tallboys on U-boat pens and railway viaducts across north Germany. At Bielefeld more than of railway viaduct was destroyed by Grand Slams creating an earthquake effect, which shook the foundations. The Boeing B-29 Superfortress was a development of the Fortress, but a larger design with four Wright R-3350 Duplex-Cyclone
44th Missile Wing During World War II, its predecessor unit, the 44th Bombardment Group was the first B-24 Liberator heavy bombardment group of VIII Bomber Command stationed in England. Colonel Leon W. Johnson, while commander of the 44th Bombardment Group, was awarded the Medal of Honor for his actions during the Ploesti Raid on 1 August 1943. The 44th Bombardment Wing, Medium was established in late December 1950 as part of the postwar Hobson Plan. The 90th Bombardment Group, reactivated by Strategic Air Command (SAC) in 1947 was assigned as its combat group. The new wing was organized at March AFB, California where