A changing drone campaign: US covert actions in 2013

 The Obama administration continued 2012′s trend of limited transparency around drone strikes. Both Obama and his new CIA director John Brennan publicly discussed the use of covert drones, but the administration remained tight-lipped on key data including casualty numbers. Officials almost always refused to discuss individual strikes, and where they did it was usually anonymously
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So basically what this means is they just don't tell you about the drone strikes any longer.

                                                      BRILLIANT