sentences:  South China Sea operations also occupied most of her 1966, 1967, and 1968 tours, replenishing the ships of the 7th Fleet on patrol in that area in support of the Vietnam War.After refueling the aircraft carrier off the southern California coast on 20 August 1971; a valve on the "Manatee" was left open and about 230,000 gallons of heavy fuel oil were spilled.The large spill created an oil slick that washed ashore, affecting a 65-mile stretch (105 kilometers) of beaches from the Mexican border northward to San Clemente, California, where President Richard Nixon was vacationing at his home there, a residence that reporters at the time often referred to as the "Western White House".