Thought I would post this video on B-24's.
Ford built a plant to mass produce them. Hitler had no idea you could make bombers this fast.
http://www.youtube.com/embed/iKlt6rNciTo?rel=0
Does the ball turret on the AH B24 lower after takeoff? I never knew that.

Convair (Consolidated merged with Vultee in 1941 to form Convair) set up an additional factory in Fort Worth, Texas, and 30,000 workers built 3,034 additional Liberators there. Additionally, Douglas Aircraft Corporation built about 964 B-24s in its factory in Tulsa, Oklahoma, and North American Aviation built about 966 in Dallas, Texas. The largest Liberator factory was Ford's huge new factory built at Willow Run, Michigan, which turned out 6,792 completed aircraft and 1,893 disassembled, crated airframes for final assembly elsewhere. In 1944, the Willow Run factory alone turned out 92,000,000 pounds (42,000,000 kg) of airframes, nearly equaling the production of the entire Japanese aircraft industry that year, or almost half of the entire German output. Peak production by all factories produced a B-24 every 55 minutes. These factories and several major depots also performed many conversions, often of hundreds of aircraft. This lead to more than sixty different designations for variations of the B-24 airframe. There were bomber, patrol bomber, reconnaissance, cargo, tanker, trainer, experimental, civil, and other variants.