奥巴马出访动荡不定的欧洲

U.S. President Barack Obama embarks on a four-day trip to Europe this week.  He leaves Washington Monday night for stops in Poland, Belgium and France.
 
The U.S. leader's trip to Europe comes at a time when Russia has made threatening moves on Ukraine.  There is also deep uncertainty about Ukraine President-elect Petro Poroshenko's ability to stabilize his country.  Mr. Obama will meet with Mr. Poroshenko in Poland.
 
President Obama will confer with U.S. allies Wednesday and Thursday in Brussels at a Group of Seven meeting that was quickly arranged after leaders decided to boycott a meeting Russia had been scheduled to host this week.
 
In France Friday, Mr. Obama will speak in Normandy at Omaha Beach for a ceremony marking the 70th anniversary of the allied D-Day invasion against Nazi forces in World War Two.