Stephen Sackur speaks to the president of Uganda, Yoweri Museveni, currently on a visit to London. He took power in Kampala at the head of a rebel army in 1986 and has delivered stability and economic progress in a country previously laid low by brutal dictatorship. But in recent years, he has faced questions about his commitment to democracy and human rights. When he took power, he said Uganda's - and Africa's - problem was leaders overstaying their time in power. Has he fallen into the same old trap?(Image: President of Uganda Yoweri K Museveni. Credit: Associated Press)