President Richard M. Nixon announces at 8 p.m. EST (May 9, 8 a.m., in Saigon) that Operation Linebacker I, the bombing of Hanoi and mining of ports, will begin on May 10.
The Air Force’s study of possible links to elevated rates of cancer among personnel who worked on intercontinental continental ballistic missiles has begun, the commander in charge of the U.S. ICBM fleet confirmed March 28. The initial phase of that study will mine cancer registries for information and compile a…