The shift of fighter-bomber squadrons, involving up to 150 U.S. planes and more than 2,000 pilots from Da Nang, to bases in Thailand is completed. The shift was necessitated by the pending withdrawal of the U.S. infantry brigade that provided security for flyers at Da Nang. The departure of the U.S. unit was part of President Richard Nixon’s Vietnamization program that he had instituted in June 1969. Under this program, the responsibility for the war was to be gradually transferred to the South Vietnamese so U.S. forces could be withdrawn.