HARARE (Reuters) - Zimbabwe s former vice president Emmerson Mnangagwa will be sworn in as president on Friday following the resignation of Robert Mugabe after nearly four decades in power, state broadcaster ZBC reported on Wednesday. Mnangagwa, who fled for his safety after Mugabe sacked him two weeks ago, will land back in Zimbabwe at 6pm (1600 GMT) at Manyame Airbase in Harare, ZBC said. 