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dracodraconisCBC News - Technology & Science - Better airport scanners delayed by privacy fears
It is believed by some that millimetre wave and backscatter X-ray machines might have foiled the Christmas Day bombing attempt, but implementation of these machines is hampered primarily by concerns about privacy arising from the fact that these machines are able to show body contours under clothing with a high degree of clarity. Where they have been implemented, passengers have been given the option of using the machines or submitting to a pat-down. The US House voted to prohibit the use of these devices for primary screening, and the European Union has requested more study regarding privacy issues before making a final decision.