Zimbabwe's Mugabe says will not impose successor, party will choose

By Philimon BulawayoMATOBO, Zimbabwe (Reuters) - Zimbabwean President Robert Mugabe said on Saturday he would not impose his successor and that if the ruling ZANU-PF party felt he should retire, it would hold an extraordinary congress to choose a new leader.The world's oldest leader, who turned 93 this week, has maintained a tight grip on power in Zimbabwe since independence from Britain in 1980.Mugabe was joined by thousands of supporters to celebrate his birthday at a school in Matobo just out