A German federal police officer walks outside the Ritz Carlton Hotel where U.S. President Barack Obama will stay during his upcoming visit in Berlin June 14, 2013. U.S. President Barack Obama will visit Berlin on June 18 to 19 and the visit comes nearly 50 years to the day after John F. Kennedy landed in a divided Berlin at the height of the Cold War and told encircled westerners in the city "Ich bin ein Berliner", a powerful signal that America would stand by them. REUTERS/Fabrizio Bensch (GERMANY - Tags: CRIME LAW POLITICS)