A prominent artificial intelligence researcher known as the "Godfather of AI" has quit his job at Google - and says he now partly regrets his work advancing the burgeoning technology due to the various risks it poses to society.

On Friday night, a federal judge struck down California's decades-long ban on "assault weapons," ruling that the ban violates the Second Amendment as understood under the precedents of District of Columbia v. Heller (2008) and United States v. Miller (1939). "Under no level of heightened scrutiny can the law survive," U.S.