Magnitude of destruction 'incredible' - UN chief in Nepal

The United Nations warns of the immense challenge of reaching Nepal flood survivors, with destroyed roads forcing aid workers to consider using cargo drones and porters to reach isolated Himalayan communities. "It is just incredible, the magnitude of the disaster, the magnitude of the destruction," says Lila Pieters Yahia, the UN chief in Nepal. "Access has been very, very, very difficult." The map below shows the scope of last week's event, with flash flooding stretching for