German Chancellor Angela Merkel (3rd L) and British Prime Minister David Cameron (1st L) view a model of an Audi driverless car during the opening ceremony of the CeBIT tech fair in Hanover, Germany, March 9, 2014. German Chancellor Angela Merkel and British Prime Minister David Cameron jointly opened CeBIT, one of the world's largest IT fairs, in western German city of Hanover on Sunday. (Xinhua/Zhang Fan) |