STORY HIGHLIGHTSGroups: Machines are intrusive, violate travelers' rights against unreasonable searchAbout 46 full body imagers are in place at 23 airports; 1,000 to be set up by end of 2011TSA has steadfastly defended their effectiveness and safetyGroups may seek legal action if the DHS does not act on the petition
via edition.cnn.com
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