<p>U.S. intelligence agencies are watching several groups of Middle Eastern men thought to be part of an infrastructure of as many as 5,000 al Qaeda terrorists and their supporters in the United States, The Washington Times has learned.</p>
<p>Small groups of about a half-dozen men in Seattle, Chicago, Detroit and Atlanta are under surveillance by FBI and other intelligence agencies and are thought to be part of Osama bin Laden's terrorist network, said intelligence officials who spoke on the condition of anonymity.</p>