Desperate survivors of an earthquake that killed more than 5,000 people clashed with riot police in Nepal's capital on Wednesday, as the United Nations appealed for $415 million for the devastated Himalayan nation. Supplies of food and water are running thin and aftershocks have strained nerves in ruined Kathmandu, home to some 2.5 million before it was shattered by Saturday's 7.8 magnitude quake. "We've been left starving in the cold and the best this government can give us is this queue. Our government is totally absent.