German Chancellor Angela Merkel asked Slovakian Prime Minister Peter Pellegrini for Slovakia's aid on investigating the kidnapping of a Vietnamese businessman in a joint presser in Berlin on Wednesday. Speaking at the press conference, Pellegrini assured the German Chancellor of his assistance on the case as Merkel pointed out the case to weigh heavily on German-Vietnamese relations. Trinh... Еще Xuan Thanh, the former chairman of PetroVietnam's construction arm, was snatched off a Berlin street in July only to reappear in Vietnam, where he was given two life sentences earlier this year for embezzlement. German daily Frankfurter Allgemeine Zeitung reported last week that Slovakia allowed visiting Vietnamese officials to borrow a government plane to fly from Bratislava to Moscow last July. It wasn't clear who was aboard.