The performance of the body scanners has been so bad that one lawmaker, Senate Homeland Security Committee Chairman Ron Johnson (R-Wisconsin), said TSA should use metal detectors as a backup system to catch threats. “These things weren’t even catching metal,” he said. “If you really want to keep using those, and I’m not saying we shouldn’t, at a minimum we should put a metal detector on the other side,” Johnson told Politico. “Why not go through two? You’ve just gotta use common sense.”
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