BERLIN, GERMANY - JULY 01:  Berlin Mayor Klaus Wowereit speaks to a journalist as a blue sky is visible behind following an event on July 1, 2014 in Berlin, Germany. Wowereit is on the Governing Board of the new BER Willy Brandt Berlin Brandenburg International Airport. The airport was originally due to open in 2011 and cost EUR 1.7 billion, though problems in its fire safety system have resulted in delays with no final date yet set for its completion and costs have ballooned to at least EUR 5.1 billion.   (Photo by Sean Gallup/Getty Images)