On September 21, 1942, the U.S. B-29 Superfortress made its
debut flight in Seattle, Washington. It was the largest bomber
used in the war by any nation.

The B-29 was conceived in 1939 by Gen. Hap Arnold, who was
afraid a German victory in Europe would mean the United States
would be devoid of bases on the eastern side of the Atlantic from
which to counterattack. A plane was needed that would travel
faster, farther, and higher than any then available, so Boeing set
to creating the four-engine heavy bomber.

The plane was extraordinary, able to carry loads almost equal to
its own weight at altitudes of 30,000 to 40,000 feet. It also sported
the first radar bombing system of any U.S. bomber.