Complex sentence: Rogers served as United States Secretary of State in the Nixon administration from January 22,1969, through September 3,1973, when he among other things initiated efforts at a lasting peace in the Arab-Israeli conflict through the so-called Rogers Plan.
Split into simpler sentences: Rogers served as United States Secretary of State in the Nixon administration from January 22,1969, through September 3,1973. One of his notable works was to initiate efforts at a lasting peace in the Arab-Israeli conflict through the so-called Rogers Plan.