The British newspaper '' The Guardian '' has revealed concern among British officials that the use of such scanners to scan children may be illegal under the Protection of Children Act 1978 , which prohibits the creation and distribution of indecent images of children . This concern may delay the introduction of routine backscatter scanning in UK airports , which had been planned in response to the attempted Christmas Day 2009 attack on Northwest Airlines Flight 253
Northwest Airlines Flight 253
Northwest Airlines Flight 253
Backscatter X-ray