  It turned out that the sourcing was inaccurate and wrong and, in some cases, deliberately misleading," Powell said on NBC's "Meet the Press" program. "And for that I am disappointed, and I regret it. " Powell made the US case against Iraq in a February 3, 2003, presentation to the UN Security Council in which he highlighted an Iraqi defectors "firsthand descriptions" of mobile biological weapons factories. Although never publicly named, the defector has been identified in US press reports as the brother of one of Chalabi's top aides. 
