This seems hard to believe, but an article in the English-language version of Spiegel Online claims that Preseident Barack Obama's planned trip to Germany in June is not going to be an official state visit. German diplomatic sources reportedly told Spiegel Online that the US president is planning a private trip in which he will go on a personal search to places of importance for his family history.
Obama's great-uncle, Charlie Payne, served in the 89th Infantry Division during World War II and participated in the liberation of Ohrdruf, a forced labor camp that was a satellite camp of Buchenwald. It's possible Obama could visit on June 5, one day before his planned participation in the celebrations of the 65th anniversary of the landing of the American troops in Normandy.
You can read the full story at: http://www.spiegel.de/international/germany/0,1518,623130,00.html.