Trains are parked outside the central train station in Frankfurt, Germany.

A man walks on a platform in the central train station in Frankfurt, Germany.

Empty rails are pictured next to a highway near Frankfurt, Germany.

Lufthansa aircrafts are parked behind a fence at the airport in Frankfurt, Germany.

Striking Lufthansa flight attendants walk past a tail of an aircraft in Frankfurt, Germany.

Police officers walk along a train in the central train station in Frankfurt, Germany.

People walk along rails in the central train station in Frankfurt, Germany.

A young woman with a longboard stands next to a train in the central train station in Frankfurt, Germany.