 Complete the following phrase:  A practitioner of Realpolitik, Kissinger played a prominent role in United States foreign policy between 1969 and 1977. During this period, he pioneered the policy of détente with the Soviet Union, orchestrated the opening of relations with China, engaged in what became known as shuttle diplomacy in the Middle East to end the Yom Kippur War, and negotiated the Paris Peace Accords, ending American involvement in the Vietnam War. Kissinger has also been associated with such controversial policies as U.S. involvement in the 