The first radio links with pilots were lost just as the pre-dawn crush of flights into Chicago began.
Air-traffic controllers in a nondescript Federal Aviation Administration building about 40 miles from the city switched to backup channels. Then those failed. They tried emergency connections, which also went dead.
Within minutes, radar feeds, flight plans and other data controllers rely on to direct more than 6,000 aircraft a day above five U.S. states had vanished as a fire was being set in a communications room one floor below. The attack was thorough and carried out by someone who knew the system intimately -- down to removing steel sheathing on data cables to destroy them, according to three people with knowledge of the incident.
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Of course Chicago's Useless Media had not and will never
make any mention of Terrorism, but We KNOW!