sentences:  Matlock was instrumental in preparing Reagan for his first summit with Gorbachev, arranging for specialists within the government to write a "Soviet Union 101" course of 21 papers on Russia for Reagan to study.Matlock also participated in a mock summit, playing the role of Gorbachev, allowing Reagan to practice the encounter in advance.Speaking at a Chautauqua conference in Jūrmala, Latvia in June 1986, Matlock told the crowd that the United States did not recognize the incorporation of the Baltic States into the Soviet Union.