Not only did the body scanners at some U.S. airports expose a traveler’s every line and curve, they weren’t very good at finding weapons, researchers say. Guns, knives and faux explosives were among the contraband snuck past the backscatter X-ray by researchers at the University of California, San Diego, the University of Michigan and Johns Hopkins University, who bought a surplus Rapiscan Secure 1000 off of eBay. The machine was still wrapped in plastic when J. Alex Halderman and others on the research team bought it from a seller in Europe for about $50,000, he told the Daily News. Their team found several vulnerabilities to render the scanner ineffective for screening contraband from those who had prior access to the machine. Researchers described the scanner as ineffective for screening contraband against those who had access to the machine to test and refine their methods, the study shows.