 Key issues handled during Harrop's tenure in Conakry were Soviet overflights and bases in the country and U.S. humanitarian aid in Guinea.In 1977, Harrop left Guinea and returned to the Bureau of African Affairs to become principle deputy to Assistant Secretary of State for African Affairs Richard M. Moose.At the Bureau of African Affairs, Harrop spent most time of issues relating to Zaire and the Horn of Africa (particularly the Ogaden War between Ethiopia and Somalia), while Moose handled most matters relating to southern Africa (South Africa, Rhodesia, Namibia, and Angola).