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: Prophecy scenario is constant, it is possible to fail missions and keep going forward in the game. Subsequent missions may become increasingly harder as the enemy gains an upper hand on the operational theater. Sidekicks may die in mission, resulting in a KIA in the leaderboard. PC Data, which tracked computer game sales in the United States, reported that "Wing Commander: Prophecy" earned $6.7 million and sold roughly 195,000 copies by October 1999. Its revenue in the country represented a drop from "Wing Commander IV". "Wing Commander: Prophecy" was nominated in the Academy of Interactive Arts & Sciences' first annual Interactive