A security training video produced by the Federal Transit Administration / National Transit Institute designed to provide transportation security personnel with procedures for identifying and reporting suspicious activity.
From the Department of Transportation website:
"The Mark" is a fast paced training video depicting a fictionalized version of an all-too-real threat against a metropolitan transit system. It demonstrates to transit employees how asking the questions and following their instincts when faced with suspicious and unusual circumtances could ultimately mean the difference between life and death.
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