 Complete the following phrase:  His 23 years at sea during his 37-year naval career included 15 years in command of destroyers, destroyer divisions and squadrons and three U.S. fleets in the Atlantic, Pacific and Mediterranean; he also served as executive assistant and senior aide to the Chief of Naval Operations in the early 1960s, earning citations for his efforts in the Cuban Missile Crisis and several other crises. In 1967, he headed the court of inquiry into the 