CNN 's Nic Robertson filmed inside main U.S. detention facility in Iraq . Prison holds 5000 inmates ; 2,000 are alleged al Qaeda members . Inmates undergo programs to help them moderate Islam . Marine Corps : ` Some have been locked up for more than three years . ` This is the battlefield of the Taliban ''
CNN 's Nic Robertson filmed inside main U.S. detention facility in Iraq . Prison holds 5000 inmates ; 2,000 are alleged al Qaeda members . Inmates undergo programs to help them moderate Islam . Marine Corps : ` ` This is the battlefield of the Taliban ''