In New Mexico, police and prosecutors backed an effort to outlaw devices that convert pistols into machine guns. In Alabama, the governor made it a priority. Today in History: May 21, Ringling Bros.

The Trump administration has decided to permit the sale of devices that enable standard firearms to fire like machine guns, a move that one person familiar with the matter said was “by far the most ...

Justice Department officials said Friday that they plan to increase efforts to locate devices used to convert semiautomatic pistols and rifles into more powerful machine guns and federally prosecute ...