Vandenberg Air Force Base, California, is the United States Air Force's rocket-launching site on the Pacific Coast. The Air Force Space Command tests missiles on the Western Range, which stretches across the Pacific Ocean to the Indian Ocean. The Air Combat Command has a headquarters at Vandenberg for intercontinental ballistic missile forces. Vandenberg Air Force Base covers about 98,400 acres (39,800 hectares) northwest of Los Angeles. It was established in 1957 on an Army training post and named after General Hoyt S. Vandenberg, the second chief of staff of the U.S. Air Force.