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In 1998, U.S. President Bill Clinton’s administration shut down an operation to kill the al Qaeda leader in Afghanistan with cruise missiles, given collateral damage estimates of 300 casualties and only 50 percent confidence in the intelligence. As the 9/11 Commission noted, “After this episode Pentagon planners intensified efforts to find a more precise alternative.” In 2000 and 2001, the U.S. Air Force struggled to reconfigure a Hellfire anti-tank missile to fit onto a Predator surveillance drone. Meeting one week before the 9/11 attacks, the National Security Council agreed that the armed Predator was not ready to be operationally deployed. The first known killing by armed drones occurred in November 2001, when a Predator targeted Mohammed Atef, a top al Qaeda military commander, in Afghanistan.
