U.N. officials Monday warned the Security Council that Central African Republic is on the brink of a catastrophe, with half the population of Bangui made homeless since ethnic warfare broke out. U.N. political affairs chief Jeffrey Feltman told the council that roughly 2.2 million people throughout Central African Republic need assistance, about half the total population. Feltman said that about half the people of Bangui have been driven from their homes, a total of about 513,000. About 100,000 are jamming a makeshift camp at the airport near the capital.