| http://www.w3.org/ns/prov#value | - The backscatter device screens passengers for metallic and nonmetallic items, including explosives, without physical contact. (AP Photo)Related Article:General aviation offers a reminder of vulnerabilityRelated content sponsored by:We have answered such requests from readers, and we have done a number of media interviews, but we have resisted writing a fresh analysis on aviation security because,
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