On Wednesday , December 30 , 2009 , the Camp Chapman attack was executed by suicide bomber Humam Khalil al-Balawi who was a Jordanian double agent loyal to al-Qaeda-linked Islamist extremists . Seven people employed by or affiliated with the CIA , including the chief of the base , Jennifer Lynn Matthews as well as a Jordanian intelligence officer , died in the attack . It remains the second-deadliest incident ever for the CIA after the 1983 United States embassy bombing . Almost three years later , on December 26 , 2012 , a suicide bomber , possibly with ties to the Afghan Taliban ( who claimed responsibility via a spokesman , Zabihullah Mujahid , claiming those who served American forces at the base were the target ) and/or the Haqqani network , killed three Afghans ( their status was not specified ) who were outside the perimeter of the base , which is near a military airport . U.S. bases in Khost , in particular Camp Salerno , have frequently been targeted by insurgents . In most cases , however , suicide attackers do not succeed in getting past the main entrance of a base . According to U.S. officials , Forward Operating Base Chapman appears to have implemented less stringent security measures than other U.S. military bases , aiming at establishing trust with informants . Subjecting informants to mistrust and excessive suspicion would reduce the amount of information received from them
Camp Chapman attack
Camp Chapman attack
Forward Operating Base Chapman