HALABJA, Iraq - U.S. specialists have discovered evidence that a Kurdish Islamic militant group that the Bush administration has linked to al-Qaida was concocting chemical weapons in the mountains of northeastern Iraq, a U.S. military commander said Tuesday. The special forces soldiers also found recipes for three forms of chlorine gas and for ricin, a deadly toxin derived from castor beans, American intelligence officials said, speaking on condition of anonymity. U.S. aircraft, 100 American special forces and more than 8,000 Kurdish fighters on Friday swept the Ansar al Islam ("Partisans of Islam") militants out of the sliver of territory...