WASHINGTON - The CIA is conducting a secretive war game, dubbed "Silent Horizon," this week to practice defending against an electronic assault on the same scale as the Sept. 11 terrorism attacks. The three-day exercise, ending Thursday, was meant to test the ability of government and industry to respond to escalating Internet disruptions over many months, according to participants. They spoke on condition of anonymity because the CIA asked them not to disclose details of the sensitive exercise taking place in Charlottesville, Va., about two hours southwest of Washington. The simulated attacks were carried out five years in the future...