Aid agencies frustrated by UN in Syria

73 NGOs working in Syria have slammed the UN's response to the humanitarian crisis there, and have suspended some cooperation with UN agencies in the country. In a joint letter, the organisations have accused the UN and the Syrian Arab Red Crescent of operating under the political influence of the Assad regime - alleging a "deliberate manipulation of humanitarian and medical aid". Kathryn Ryan talks to Dr Ahmad Tarakji of the Syrian American Medical Society Foundation or SAMS, one of the signatories to the letter.