World's costliest train station opened in New York at 9/11 site.

 On 3 March 2016 World's most expensive train station, the World Trade Centre Transportation Hub, opened in New York city.
•    Santiago Calatrava, the Spanish-Swiss architect who unveiled his ambitious design 12 years ago, removed a barrier at the entrance of the Oculus, a giant oval hall with walls of steel ribs and glass.
•    Built next to the site of the destroyed Twin Towers, the World Trade Centre Transportation Hub is expected to eventually serve more than 200000 daily commuters.
•    Initially budgeted at 2 billion US dollars, the station ended up costing 3.85 billion US dollars that earned it the title of the most expensive station in the world.
•    The building has an elliptical shape. The space measures 107 metres long by 35 metres at its widest point.
•    The September 11 attacks were a series of four coordinated terrorist attacks by the Islamic terrorist group Al-Qaeda on the United States on the morning of Tuesday, September 11, 2001. The attacks consisted of suicide attacks used to target symbolic U.S. landmarks.