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b'Ever since the first magnetometers in the 1970s, airport authorities have sought better ways to see if people are hiding weapons or contraband. In recent years the old methods have give way to imaging. Now the Johns Hopkins Applied Physics Laboratory is working with the Transportation Security Administration to perfect imaging systems passengers can simply walk right through, potentially eliminating lines, scanners and pat-downs. Here with more on the technology, physics lab program manager Chris Thompson, and lead engineer Shayne Gerber.\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'