When the Shooting Stops

Nearly half of all peace agreements fail. What can be done to stop countries from sliding back into civil war? Sri Lanka and Uganda are two countries that have suffered long and brutal civil wars, but have managed, to keep the peace - at least so far. BBC foreign affairs correspondent, Mike Thomson, who has reported from many conflict zones around the world, investigates how well both countries have managed to heal the wounds of war and what their experiences can teach us about winning the peace.