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Trained others? >> i think the understanding is that he has instructed other people in his techniques. now, hes obviously a pretty skilled bomb maker. you know, to what extent has he rplicated himself i dont think is clear. >> reporter: could his newest bombs evade detection by those tsa body scanners? thats not clear. the tsa would only tell us it has a multi-layered strategy to detect explosives, including what it calls the best imaging technology. brian todd, cnn, washington. outfront tonig...