Top photograph of Tibetan protesters outside the United Nations building by Mary Altaffer/AP; lower photograph of the riots in Lhasa, Tibet from the AP Roughly 100 protesters, most of them Tibetans, demonstrated outside the United Nations today against the Chinese government, which has been trying to put down protests and rioting in Lhasa. Three demonstrators were arrested for trying, unsuccessfully, to enter the U.N. and six were arrested for disorderly conduct. This demonstration coincided with......