Complex sentence: With the reunification of Germany, flights to the east were added and the airline leased a Fokker 100 and the routes of Berlin based Tempelhof Airways were taken over and Berlin became a second hub for Hamburg Airlines.
Split into simpler sentences: With the reunification of Germany, flights to the east were added. The airline leased a Fokker 100 and the routes of Berlin based Tempelhof Airways were taken over, thus Berlin becoming a second hub for Hamburg Airlines.