Audio Transcript:

Bottlenecks and infrastructure damage have been holding up aid efforts in Haiti, where Tuesday's earthquake has left as many as 45,000-50,000 dead. There is little sign of humanitarian supplies beyond the Port-au-Prince airport, and correspondents say there is increasing anger among survivors. President Barack Obama pledged a huge aid effort, but warned it would take time for help to reach people. We get an update from UN spokesman Vincenzo Pugliese.