Hans-Dietrich Genscher was a German statesman and a member of the liberal Free Democratic Party, who served as Federal Minister of the Interior from 1969 to 1974, and as Federal Minister for Foreign Affairs and Vice Chancellor of Germany from 1974 to 1992, making him the longest-serving occupant of either post and the only person to have held one of these positions under two different Chancellors of the Federal Republic of Germany. Wikipedia