Millionaire Howard Hughes crashes into Lake Mead, while test flying his Sikorsky S-43, killing CAA inspector Ceco Cline and Richard Felt
- The United States Army contracts with the University of Pennsylvania's Moore School to develop the ENIAC (Electronic Numerical Integrator And Computer).
- World War II: the Dambuster Raids by No. 617 Squadron RAF on German dams
- Johnny Warren, Australian Footballer (d. 2004)
- Vicky Moscholiou, Greek singer (d. 2005)
- Montagu Love, actor (Wind), dies at 65