WASHINGTON (AP) — An Air Force security team’s botched response to a simulated assault on a nuclear missile silo has prompted a blistering review followed by expanded training to deal with the nightmare scenario of a real attack.

The Air Force recognized the possibility of such an intrusion as more worrisome after the 9/11 terrorist attacks. But an internal review of the exercise held last summer at Malmstrom Air Force Base in Montana said the security forces were unable to speedily regain control of the captured silo, and called this a “critical deficiency.”