UN warns of risks in Gaza

UN aid agencies have raised concerns of the severe consequences of Israel's 'total siege' on Gaza in response to the Hamas attacks four days ago. In a press conference the United Nations humanitarian office said nearly 200,000 people, that's nearly a tenth of the strip’s population, have fled their homes in Gaza, with fears about water shortages due to a blockade. Sam Fenwick hears the latest from the region and from those trying to send aid in.