就任中の最初の任期中に過去10人の米国大統領による外国への最初の訪問は何でしたか、そしてそれらの訪問中にそれらの国の国家元首は誰でしたか？
What were the inaugural visits to foreign states by the last 10 U.S presidents during their first term in office, and who were the heads of states in those countries during those visits?