TSA officials have told a congressional watchdog agency that no cost-benefit analysis was conducted before deciding to deploy thousands of new full-body scanners in U.S. airports over the next two years. With total operational costs for the scanners expected to reach $2.4 billion, the Government Accountability Office says such an analysis is needed. "While we recognize that TSA is taking action to address a vulnerability of the passenger checkpoint exposed by the December 25, 2009 attempted attack, we continue to believe that, given TSA's expanded deployment strategy, conducting a cost-benefit analysis of TSA's [advanced imaging technology] deployment is important," the GAO said in a report last week.

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