WASHINGTON – The Trump administration moved Tuesday to officially ban bump stocks, which allow semi-automatic weapons to fire rapidly like automatic firearms, and has made them illegal to possess beginning in late March. The devices will be banned under a federal law that prohibits machine guns, according to a senior Justice Department official. Bump stocks became a focal point of the national gun control debate after they were used in October 2017 when a man opened fired from his Las Vegas hotel suite into a crowd at a country music concert below, killing 58 people and injuring hundreds more in...