On May 19, in one of the first anti-terrorism cases brought against U.S. citizens since September 11, Mukhtar al-Bakri, a 23-year-old Yemeni American from Lackawanna, N.Y., pleaded guilty to the charge of providing "material support" to al-Qaeda. Prior to 9-11, al-Bakri and five other young Yemeni Americans had traveled to an al-Qaeda camp in Afghanistan, where they received six weeks of training before deciding to return home. According to the defendants, they left the camp because they did not feel comfortable with al-Qaeda's militancy; one even faked an ankle injury to leave early. A post-9-11 Department of Justice investigation led authorities to the young men, who were quickly dubbed a sleeper cell and brought to trial.