FILE - In this Dec. 19, 1979 file photo Robert Mugabe co-leader of the Patriotic Front guerrilla forces, is seen at a press conference in London when it was announced that he and Joshua Nkomo had reached an agreement at Lancaster House on a new constitution, transitional arrangements and a ceasefire. Zimbabwe's Parliament erupted in cheers Tuesday Nov. 21, 2017 after the speaker announced the resignation of President Robert Mugabe after 37 years in power. (AP Photo, File)