U.S. Reviews Air Defenses to Thwart Terror From Skies

I’m not sure how one can ever place a price tag on preventing another 9/11…or worse.

The commander of military forces protecting North America has ordered a review of the costly air defenses intended to prevent another Sept. 11-style terrorism attack, an assessment aimed at determining whether the commitment of jet fighters, other aircraft and crews remains justified.

Senior officers involved in the effort say the assessment is to gauge the likelihood that terrorists may succeed in hijacking an airliner or flying their own smaller craft into the United States or Canada. The study is focused on circumstances in which the attack would be aimed not at a public building or landmark but instead at a power plant or a critical link in the nation’s financial network, like a major electrical grid or a computer network hub.

The review, to be completed next spring, is expected to be the military’s most thorough reassessment of the threat of a terrorism attack by air since Al Qaeda’s strikes on Sept. 11, 2001, transformed a Defense Department focused on fighting other militaries and led to the Bush administration’s “global war on terror.”

The assessment is partly a reflection of how a military straining to fight two wars is questioning whether it makes sense to keep in place the costly system of protections established after those attacks on the World Trade Center and the Pentagon. Though the last of the air patrols above American cities were discontinued in 2007, the military keeps dozens of warplanes and hundreds of air crew members on alert to respond to potential threats.

“The fighter force is extremely expensive, so you always have to ask yourself the question ‘How much is enough?’ ” said Maj. Gen. Pierre J. Forgues of Canada, director of operations for the North American Aerospace Defense Command, or Norad, which carries out the air defense mission within the United States military’s Northern Command

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