Pakistani security personnel guard the main entrance of Pakistan air force base in Kamra, about 85 kilometers (50 miles) northwest of Islamabad, Pakistan on Thursday, Aug. 16, 2012. Militants attacked the air force base filled with F-16s and other aircraft before dawn Thursday, sparking a heavy battle with security forces that left parts of the base in flames, officials said. (AP Photo/B.K. Bangash)
