UNITED NATIONS - U.N. weapons inspectors haven't found any weapons of mass destruction in Iraq but chief inspector Hans Blix said many proscribed materials remain unaccounted for. Inspectors "has not found any such weapons, only a small number of empty chemical munitions, which should have been declared and destroyed," he said. " Another matter and one of great significance is that many proscribed weapons and items are not accounted for. One must not jump to the conclusion that they exist. However, that possibility is also not excluded. If they exist, they should be presented for destruction. If they do not...