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Pages 3-4

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From page 3...
... The threat communication (identification and dissemination) mechanism described herein would form a critical component of the PTII as well as serve as a means of protecting the PTII and identifying threats against it and the public transportation infrastructure.
From page 4...
... Direct reports from employees or customers are also key sources of threat information. Often in the form of an alert, threat information is disseminated (though, not often formally)

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