Homeland Security Secretary Michael Chertoff, left, speaks as Attorney General Alberto R. Gonzales, right, looks on, during a press briefing Thursday, Aug. 10, 2006, in Washington about the terror threat uncovered in Britain. The U.S. government issued its highest terrorism alert ever for commercial flights from Britain to the United States in response to a terror plot disrupted Thursday in London and raised the threat level for all domestic and international flights. (AP Photo/Ron Edmonds)
