A Yemeni-American man acknowledged he met al Qaeda leader Osama bin Laden in Afghanistan in 2001 as he pleaded guilty on Tuesday to charges of supporting the militant Islamist network. Sahim Alwan was the fourth of six U.S. citizens of Yemeni descent to reach a plea agreement with the government on charges they were part of an al Qaeda “sleeper cell” operating in the United States, but was the only one to tell investigators he met bin Laden. The six, who come from the steel town of Lackawanna, New York, near Buffalo on the Canadian border, were arrested in September 2002 on charges they attended an al Qaeda training camp near Kandahar, Afghanistan in April 2001. They initially pleaded not guilty. None were accused of involvement in the Sept. 11, 2001, attacks in New York and Washington or other acts of violence believed masterminded by bin Laden. Full Story