he drone has become America's counter-terrorism weapon of choice. But does drone warfare really further U.S. goals abroad? To wartime strategists under both George W. Bush and Barack Obama, the new weapon, like many innovations in the history of military technology, seemed at first like a silver bullet. Drones with lethal missiles could hover for hours over potential targets, waiting for the moment to strike. They could kill suspected terrorists with relative precision, though not, as the CIA claimed in 2011, without any civilian casualties. Best of all, drones didn't endanger American lives; the pilots were safe and snug in Djibouti or Nevada.