Shia Islam's holy sites in Iraq

BBC correspondent Hugh Sykes has been given rare access to two of Shia Islam's holiest shrines, both located in the central Iraqi city Karbala, south-west of the capital Baghdad. This is the shrine of Imam Hussein, who Shias revere as the designated successor to Prophet Mohammed's son Imam Ali - until the split that led to the two main Islamic branches, Shia and Sunni. Imam Hussein's tomb is...