The Al-Qaida 'Triple Agent' Who Infiltrated The CIA - npr.org
Excerpt:
On Dec. 30, 2009, seven CIA employees were killed by a suicide bomb at a fortified base in Afghanistan near the Pakistani border.
The bomber, a Jordanian doctor named Humam Khalil Abu-Mulal al-Balawi, had gotten inside the highly secure base by duping both the CIA and the Jordanian General Intelligence Department, who thought he was a trusted informant.