Taliban attack on covert US base in Afghanistan complicates Biden withdrawal decision In one of the most significant attacks against US forces in Afghanistan recently, CNN has learned that the Taliban twice targeted one of the most heavily guarded bases in the country late last month and that US military personnel working for the CIA were at the installation when it came under fire. Rockets landed near Forward Operating Base Chapman, a classified US military installation in eastern Afghanistan, and wounded seven civilians outside the base, according to a US official familiar with the details. During a second attack, a water tower was hit and a few rounds landed on the base, though no US personnel were killed or injured.