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
Wing Commander (horse) his show career in 1946, as a three-year-old. He won every show he entered that year, but lost twice the next year, 1947, when he was shown against older horses. Both losses ended with him placing second. In 1948 Wing Commander and Teater won the first of six World's Grand Championships at the World's Championship Horse Show, part of the Kentucky State Fair. In addition to being shown under saddle, Wing Commander was trained to pull a fine harness cart, although he was not shown in harness. Following his show career, Wing Commander was retired to stud and was the