 Complete the following phrase:  In 1987, Zimble was promoted to vice admiral VADM and held the office of Surgeon General of the United States Navy. As Navy Surgeon General, Zimble was the principal medical advisor to the United States Department of the Navy. He was responsible for developing and establishing overall naval health care policies and priorities, contingency and wartime planning, and program development in support of more than 2.8 million United States Navy and Marine Corps active duty and retired beneficiaries and their families. During this period, Zimble also presided over the disestablishment of the Naval Medical Command and the re-establishment of the Navy Bureau of Medicine and Surgery BUMED. He also oversaw the deployment of the Navys two hospital ships USNS Mercy and USNS Comfort, the fleet hospitals, and Medical Department personnel for 