Nine years after the Sept. 11 attacks and decades after hijackers first began to target passenger airliners, the United States has invested billions of dollars in an airport system that makes technology the last line of defense to intercept terrorists.
It has yet to catch one.
In every known recent attempt, terrorists have used a different tactic to evade the latest technology at airport checkpoints, only to be thwarted by information unearthed through intelligence work – or by alert passengers in flight.
http://hotair.com/archives/2010/12/17/tsas-checkpoint-heavy-approach-not-effective/
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