Here is a historic article about the Douglas DB-7/A-20 Havoc (the British pilots called it the "A-20 Boston Bomber"): throughout the entire course of the war, there was no other attack bomber manufactured in greater numbers than this one (7,477).
"An eyewitness report of a pre-invasion mission over the continent in one of the newest and most effective U.S. air weapons, an attack bomber that looks like an insect but moves and hits with the speed of a meteor..."
Click here to read more articles about W.W. II weapons and inventions.
Click here to read about the P-47 fighter plane.
Click here to read about the Japanese Zero.