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Of the 19 identified hijackers (in the September 11 attacks), three were present in the United States on student visas. At least two of those terrorists gained skills to carry out those attacks at an American flight school. Those attacks demonstrate how easily alie...

www.ericdigests.org/2004-4/tracking.htm

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Newer Technologies for School Security. ERIC Digest Number 145.

considering. Metal-detector wands are relatively inexpensive, and can be used by security personnel or other staff to check individuals for hidden weapons. Detection portals, which students can walk through, are much more expensive, and baggage x-ray machines can cost in the...

www.ericdigests.org/2001-4/security.html

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