6/18: Officials say NSA stopped over 50 potential terror attacks; Hi-tech giant creates next generation of Edisons

      |General Keith Alexander said the NSA's surveillance programs have helped stop more than 50 potential strikes since the 9/11 attacks. At least 10 of them involved homeland-based threats. Bob Orr reports; and, in a pilot program in Tucson, Ariz., aerospace and defense contractor Raytheon is spending $100 million in hopes of inspiring future engineers and technology professionals. Anthony Mason reports.

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