The 10th anniversary of the end of Angola's devastating post-independence civil war is being marked in 2012. What a difference a decade makes. Angola is now one of Africa's powerhouse economies, enjoying growth that puts the West to shame, and exploiting China's insatiable demand for commodities, especially oil.Stephen Sackur speaks to Angola's foreign minister, Georges Chikoti. For Angola and Africa, this is an era of opportunity; will it be seized or squandered?