Gotthard Switzerland: World's longest rail tunnel opens

The world's longest and deepest rail tunnel has officially opened in Switzerland, after almost two decades of construction work.

The 57km (35-mile) twin-bore Gotthard base tunnel will provide a high-speed rail link under the Swiss Alps between northern and southern Europe.

Famed for their trains, the Swiss held a party to mark the official opening of the tunnel with dancers, acrobats and drama.