“The extent of the cooperation between the Pakistani Taliban and al-Qaeda could be seen in the suicide bombing that killed seven CIA officers and contractors in the American base at Khost in eastern Afghanistan on December 30, 2009. The suicide bomber, Humam Khalil Abu-Mulal al-Balawi, a Jordanian doctor, was a double agent: information he had earlier provided to the CIA was used to target militants in Pakistan.”
– Peter Bergen, The Longest War, Page 211