Even before he was elected, Barack Obama became a hero in Europe with a vow of internationalism to replace the go-it-alone approach of George W. Bush. Eight years later, Obama was back in Europe this week, trying to overcome the perception that he's become disengaged.
The European Union is struggling with trade, the massive influx of refugees and the threat that Britain might withdraw. We hear what could be his last message and what's next for some of America's oldest and most powerful allies.