1946 - The Northrop YB-35 experimental heavy bomber made its maiden flight over Hawthorne, California. The ancestor of the B2 Stealth Bomber, the YB-35 flying wing was a dramatic advance in aero technology. But while the concept was innovative to the extreme the propeller drive system was obsolete and the engine exhaust design a nightmare. As such the project was cancelled in 1949 and shelved until technology caught up and made the concept feasible in the 1980's.