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.
F-35As from the Vermont Air National Guard have deployed to Puerto Rico in recent days, continuing a major buildup of U.S. Air Force assets in Latin America aimed at combating drug trafficking and pressuring the regime of Venezuelan leader Nicolas Maduro.

