Co - authors : President Obama stepped up drone attacks in Afghanistan . They say roughly a quarter of those killed appear to be militants . This is 50 civilians for every militant killed , a hit rate of 2 percent . '' Drone attacks are the least bad thing for the U.S. vs. Afghanistan , they say .
Co - authors : President Obama stepped up drone attacks in Afghanistan . They say roughly a quarter of those killed appear to be militants . Drone attacks are the least bad thing for the U.S. vs. Afghanistan , they say .