Spencer Ackerman, formerly of Wired News and now with the Guardian, reports today: “A study conducted by a US military adviser has found that drone strikes in Afghanistan during a year of the protracted conflict caused 10 times more civilian casualties than strikes by manned fighter aircraft.” The new study was referenced in an official US military journal, and shows that US officials’ claims that unmanned planes can target more efficiently than manned counterparts are not true. [guardian.co.uk]