epa03528692 A chain lock is hung on a construction site fence outside at the terminal building of the new Berlin airport Berlin Brandenburg Willy Brandt (BER) in Schoenefeld, Germany, 09 January 2013. Berlin's new airport will not open until at least 2014 after the date was delayed for a fourth time, sparking protests that led the city mayor to cut his ties with the troubled project on 07 January 2013. In the planning since 1996, the airport - meant to become Germany's gateway to the world - has been plagued by cost overruns, delays and technical glitches, crucially a faulty fire safety system. When it eventually opens, Willy-Brandt Airport will replace Berlin's three smaller air hubs - Tegel, Schoenefeld and the now closed Tempelhof, made famous by the Cold War Berlin airlift. EPA/PATRICK PLEUL