On December 29, 1939, the XB-24 took its first flight - just a few months ... "We must be the arsenal of democracy." The B-24 bomber, dubbed the Liberator, would become a mainstay of that arsenal.

On this day in aviation history, December 29, 1939, the first prototype of the Consolidated B-24 Liberator made its first flight. In time, the Liberator would become the most widely produced ...