Knox Chitiyo, an expert from the Royal United Services Institute (RUSI), joins Sir David to discuss what this deal means for Zimbabweans and the future of their country.
After 28 years of rule and seven weeks of hard negotiations, President Robert Mugabe agreed on Thursday night to share power with opposition leader and long-time rival, Morgan Tsvangirai.
Under the deal, Mr Tsvangirai will become prime minister and Robert Mugabe will stay on as president.
