Sudan and South Sudan have signed an agreement on trade and security that should allow the resumption of oil exports.<br /> <br />Oil is the main source of income for both countries - and has brought them to the brink of war.<br /> <br />The Presidents of the two countries, South Sudan's Salva Kiir and Sudan's Omar al-Bashir signed the deal in the Ethiopian capital Addis Ababa. <br /> <br />Imran Khan reports.
