In the aftermath of a mass shooting on a New York City subway train, the mayor floated a high-tech idea: deploy scanners that can spot someone carrying a gun into the transit system before they have a chance to use it. The technology to scan large numbers of people quickly for weapons does exist, and…
After deadly shootings on the subway and around the country, New York’s mayor wants to install gun detectors at select stations. Transit and police officials are interested, but have doubts about whether the systems could work to avert deadly attacks.