After five and a half years as a prisoner of war in Vietnam, naval aviator John McCain returned home a changed man. Regaining his health and flight-eligibility status, he resumed his military career, commanding carrier pilots and serving as the navy's liaison to what is sometimes ironically called the world's most exclusive club, the United States Senate. Accompanying Senators John Tower and Henry "Scoop" Jackson on international trips, McCain began his political education in the company of two masters, leaders whose standards he would strive to maintain upon his election to the U.S. Congress. There, he learned valuable lessons in cooperation from a good-humored congressman from the other party, Morris Udall. In 1986, McCain was elected to the U.S. Senate, inheriting the seat of another role model, Barry Goldwater.