The word ambassador, as used in the passage, most nearly means ____.
It is not surprising that John Fitzgerald Kennedy entered public service. He came from a family that valued such commitment, including his father, Joseph P. Kennedy. The elder Kennedy served as ambassador to Great Britain from 1937 to 1940. John served his country in the U.S. Navy after he graduated from Harvard University. During that time, Kennedy escaped death while serving as skipper of a PT boat in the Pacific. He even rescued another Navy man by swimming, with him in tow, to the shore of a safe island.