From left: Rainer Schwarz, Hartmut Mehdorn (Deutsche Bahn), Mayor of Berlin Klaus Wowereit, Brandenburg State Governor Matthias Platzeck, Transport Minister Wolfgang Tiefensee and Thomas Weyer (CEO of BBI) attend the ground-breaking ceremony at the new Berlin-Brandenburg International airport (BBI) at Schoenefeld on September 5, 2006 in Berlin, Germany. Getty Images
A visitor takes a picture with a mobile phone in Terminal 2 of Willy Brandt Berlin-Brandenburg Airport (BER) on September 25, 2020 in Schönefeld, Germany. Getty Images
A brand-new, unused body scanner is seen in the security check area of Terminal 2 at Willy Brandt Berlin-Brandenburg Airport. Getty Images
A lettering reading 'please stay behind the line' next to a conveyor belt at the arrival area is seen during a press tour at the Terminal 2 of upcoming Willy Brandt Berlin-Brandenburg Airport. EPA
Aerial view of the future airport Berlin Brandenburg "Willy Brandt". dpa via AP
A general view from the terminal during a trial run of the baggage system at Berlin Brandenburg Airport on July 28, 2020. Getty Images
A woman looks at the departure board during a trial run of the baggage system at Berlin Brandenburg Airport. Getty Images
A general view of the airport terminal during a trial run of the baggage system at Berlin Brandenburg Airport. Getty Images
Employees work at the unfinished Berlin Brandenburg Airport on May 8, 2019. Getty Images
Employees work at the unfinished Berlin Brandenburg Airport. Getty Images
Visitors walk through a wing of the main departures hall at the Berlin Brandenburg Airport on April 10, 2018. Getty Images
A worker stands on a raised platform inside the main departures hall at the Berlin Brandenburg Airport. Getty Images
Two workers stand on the tarmac next to the main arrivals and departures hall of the unfinished Berlin Brandenburg Airport on November 4, 2014. Getty Images
The main terminal of the construction site of the new Berlin Brandenburg Airport stands under rainy weather on April 27, 2013. Getty Images
The main terminal building of the still-unopened Berlin Brandenburg Airport stands on March 8, 2013. Getty Images
The entrance place of the construction site of the new Berlin Brandenburg Airport stands at dusk on January 8, 2013. Getty Images
The Lufthansa first-class lounge and a check-in counter are seen on the construction site of the Berlin Brandenburg Airport on September 11, 2012. Getty Images
The main terminal and the control tower stand illuminated at the construction site of the new Berlin Brandenburg Airport on August 15, 2012. Getty Images
A worker installs an awning in the departures area at Berlin Brandenburg Airport on May 4, 2012. Getty Images
A worker passes boards displaying flight information from nearby airports as a test to make sure they are running correctly in the departures area of Berlin Brandenburg Airport. Getty Images
An air traffic controller looks out onto the tarmac following the official inauguration of the new control tower at Berlin Brandenburg Airport on April 25, 2012. Getty Images
A worker walks on the tarmac at Berlin Brandenburg Airport on March 20, 2012. Getty Images
View of the construction site inside the main terminal of the new Airport Berlin Brandenburg International BBI is pictured on March 2, 2011. Getty Images
An aircraft shaped crown is lifted by a crane at the main terminal during the roofing ceremony at the new Airport Berlin Brandenburg International BBI on May 7, 2010. Getty Images
From left: Rainer Schwarz, Hartmut Mehdorn (Deutsche Bahn), Mayor of Berlin Klaus Wowereit, Brandenburg State Governor Matthias Platzeck, Transport Minister Wolfgang Tiefensee and Thomas Weyer (CEO of BBI) attend the ground-breaking ceremony at the new Berlin-Brandenburg International airport (BBI) at Schoenefeld on September 5, 2006 in Berlin, Germany. Getty Images
A visitor takes a picture with a mobile phone in Terminal 2 of Willy Brandt Berlin-Brandenburg Airport (BER) on September 25, 2020 in Schönefeld, Germany. Getty Images
A brand-new, unused body scanner is seen in the security check area of Terminal 2 at Willy Brandt Berlin-Brandenburg Airport. Getty Images
A lettering reading 'please stay behind the line' next to a conveyor belt at the arrival area is seen during a press tour at the Terminal 2 of upcoming Willy Brandt Berlin-Brandenburg Airport. EPA
Aerial view of the future airport Berlin Brandenburg "Willy Brandt". dpa via AP
A general view from the terminal during a trial run of the baggage system at Berlin Brandenburg Airport on July 28, 2020. Getty Images
A woman looks at the departure board during a trial run of the baggage system at Berlin Brandenburg Airport. Getty Images
A general view of the airport terminal during a trial run of the baggage system at Berlin Brandenburg Airport. Getty Images
Employees work at the unfinished Berlin Brandenburg Airport on May 8, 2019. Getty Images
Employees work at the unfinished Berlin Brandenburg Airport. Getty Images
Visitors walk through a wing of the main departures hall at the Berlin Brandenburg Airport on April 10, 2018. Getty Images
A worker stands on a raised platform inside the main departures hall at the Berlin Brandenburg Airport. Getty Images
Two workers stand on the tarmac next to the main arrivals and departures hall of the unfinished Berlin Brandenburg Airport on November 4, 2014. Getty Images
The main terminal of the construction site of the new Berlin Brandenburg Airport stands under rainy weather on April 27, 2013. Getty Images
The main terminal building of the still-unopened Berlin Brandenburg Airport stands on March 8, 2013. Getty Images
The entrance place of the construction site of the new Berlin Brandenburg Airport stands at dusk on January 8, 2013. Getty Images
The Lufthansa first-class lounge and a check-in counter are seen on the construction site of the Berlin Brandenburg Airport on September 11, 2012. Getty Images
The main terminal and the control tower stand illuminated at the construction site of the new Berlin Brandenburg Airport on August 15, 2012. Getty Images
A worker installs an awning in the departures area at Berlin Brandenburg Airport on May 4, 2012. Getty Images
A worker passes boards displaying flight information from nearby airports as a test to make sure they are running correctly in the departures area of Berlin Brandenburg Airport. Getty Images
An air traffic controller looks out onto the tarmac following the official inauguration of the new control tower at Berlin Brandenburg Airport on April 25, 2012. Getty Images
A worker walks on the tarmac at Berlin Brandenburg Airport on March 20, 2012. Getty Images
View of the construction site inside the main terminal of the new Airport Berlin Brandenburg International BBI is pictured on March 2, 2011. Getty Images
An aircraft shaped crown is lifted by a crane at the main terminal during the roofing ceremony at the new Airport Berlin Brandenburg International BBI on May 7, 2010. Getty Images
From left: Rainer Schwarz, Hartmut Mehdorn (Deutsche Bahn), Mayor of Berlin Klaus Wowereit, Brandenburg State Governor Matthias Platzeck, Transport Minister Wolfgang Tiefensee and Thomas Weyer (CEO of BBI) attend the ground-breaking ceremony at the new Berlin-Brandenburg International airport (BBI) at Schoenefeld on September 5, 2006 in Berlin, Germany. Getty Images