By NATE SILVER
What we aren’t told, however, is how many of those 50,000 passengers were asked to pass through the full-body scanners — what the T.S.A. calls “advanced imaging technology” or AIT — in the first place.
http://fivethirtyeight.blogs.nytimes.com/2010/11/29/what-the-t-s-a-hasnt-told-us
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