Economy, security crises in focus as Obama arrives in Germany

By Roberta Rampton HANOVER, Germany (Reuters) - U.S. President Barack Obama arrived in Germany on Sunday to hold talks with German Chancellor Angela Merkel, one of his closest allies in dealing with a shaky global economy and security crises in the Middle East and Ukraine. It will be the last stop on a six-day foreign journey where Obama has sought to shore up U.S. alliances he views as key to increase trade, defeat Islamic State militants and offset Russian intervention in Ukraine and Syria. Ob