Revealed in Snowden documents, details on how NSA is involved in drone assassination program

The U.S. government has never publicly acknowledged killing Hassan Ghul, identified as an Al Qaeda operative amd close associate of Osama Bin Laden. But in documents provided to the Washington Post by Edward Snowden, confirmation that he died in October 2012, along with revelation of the NSA's "extensive involvement in the targeted killing program that has served as a centerpiece of President Obama's counterterrorism strategy."