Grace Mugabe back in Zimbabwe after being accused of assault in South Africa

Zimbabwe's first lady, Grace Mugabe, returned home on Tuesday from South Africa after failing to turn herself in to police in Johannesburg to face charges of assaulting a model in a hotel room. There was no immediate public comment on the case from Grace, 52, a possible successor to her husband President Robert Mugabe, 93, who has ruled Zimbabwe since 1980. But Zimbabwe government sources