Obama in Berlin: ‘We can’t hide behind a wall’

Former President Barack Obama and German Chancellor Angela Merkel attend a discussion at the German Protestant Kirchentag in front of the Brandenburg Gate in Berlin on May 25.Former President Barack Obama seemed to take a subtle swipe at his successor Thursday, telling a Berlin audience that the world cannot “hide behind a wall” — an apparent reference to President Trump’s signature campaign promise to build a wall on the U.S.-Mexico border.Obama was in Germany for K