Sen. Susan Collins, a Maine Republican, and fellow GOP senators accused the Obama administration of creating a "manufactured crisis" by furloughing FAA air traffic controllers and causing delayed flights. J. Scott Applewhite/AP hide caption

toggle caption J. Scott Applewhite/AP

The current radar-based air traffic control system (shown here) will eventually be replaced with a new system called NextGen, which will rely on GPS. A number of computer security experts are concerned that NextGen is insecure and vulnerable to hackers. John Moore/Getty Images hide caption

toggle caption John Moore/Getty Images

Could The New Air Traffic Control System Be Hacked?

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