Series of profiles of people who are currently making headlines. Mishal Husain looks at Susan Rice, a rising star in Barack Obama's inner circle of policy advisors. As Director of Peacekeeping at the National Security Council, Rice was criticised for not taking enough of a hard line during the Rwandan genocide in 1994. Three years later she became Assistant Secretary of State for Africa under Bill Clinton. Recently she has taken a tough stance on Sudan, advocating US military force.