In October 2001, Ross twice linked Iraq to the anthrax attacks in the United States. These reports, based on anonymous "high level" sources, were denied by the administration. In November 2001, Ross updated the story, acknowledging that original reports of bentonite in the anthrax samples were incorrect. Glenn Greenwald criticized Ross for the story, stating that Ross unwittingly helped build support for the invasion of Iraq as a result of this high-profile report. Dan Froomkin asked on August 5, 2008, in "The Washington Post": "So who told ABC the powder looked Iraqi?" "The New York Sun" reported that Ross was the sixth journalist ordered by a federal judge to reveal his sources for federal anthrax attack stories.