Since then, the C.I.A. bombardments have continued at a rapid pace. According to a just completed study by the New America Foundation, the number of drone strikes has risen dramatically since Obama became President. During his first nine and a half months in office, he has authorized as many C.I.A. aerial attacks in Pakistan as George W. Bush did in his final three years in office. The study’s authors, Peter Bergen and Katherine Tiedemann, report that the Obama Administration has sanctioned at least forty-one C.I.A. missile strikes in Pakistan since taking office—a rate of approximately one bombing a week. So far this year, various estimates suggest, the C.I.A. attacks have killed between three hundred and twenty-six and five hundred and thirty-eight people. Critics say that many of the victims have been innocent bystanders, including children.