A prototype pistol that can read fingerprints and require a passcode before firing may herald a new era of 'smart guns,' developed in an effort to improve gun safety in the U.S. | Reuters

Automatic gunfire incidents are skyrocketing, and experts blame switches that transform semi-automatic weapons in moments. https://cnn.it/3KvFq6A | CNN

The technology to stop guns without magazines from firing has existed for over a century, but gun rights advocates have fought efforts to mandate it. Tonight, NBC News' Maggie Vespa takes a closer look at magazine disconnects and the lives that may have been saved if they were required for firearms. | NBC Nightly News with Tom Llamas