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>> but the nra sees this as a potential form of gun control. new jersey already requires gun retailers to sell smart guns, a development gun activists find alarming. met le bring in marco hirsch, the president of the smart tech challenges foundation, everything from biometrics to radiofrequency identification tags and mechanical locks. margo, good to see you. >> nice to see you, brooke. >> explain to me how a smart gun would work. >> yes. a smart gun is essentially a personalized gun. it has a t...