sentences:  On 29 January 2002, Norbert Rüther, Ernst Schwanhold, Hartmut Mehdorn and Angelika Mertens performed its groundbreaking ceremony.It was opened on 12 June 2004 in the presence of German Chancellor Gerhard Schröder.A connecting structure between the station and Terminal 1 was built from May 2006 to June 2007.