Trondheim is a critical battleground for both factions. Trondheim was the name of a planet in the Hundred Worlds of the Ender's Game book series. Trondheim has an international airport, Trondheim Airport, Værnes, situated in Stjørdal, which is Norway's fourth largest airport in terms of passenger traffic. Værnes has non-stop connections to cities such as London, Amsterdam, Copenhagen, Stockholm and Berlin, among others. The domestic route Trondheim - Oslo is among the busiest air routes in Europe with around 2 million passengers annually. Busiest air routes Major railway connections are the northbound Nordland Line, the eastbound Meråker Line to Åre and
Trondheim Tramway who wanted the tram to survive. AS Gråkallbanen only operated the one line. In 2005 the company was bought by Veolia Transport Norge. Advocates of the trams have suggested expanding the tramway from its present terminus at St. Olav's Gate through the city core to Trondheim Central Station or Nedre Elvehavn onwards to Brattøra and Trondheim Port. This has been supported by the city council, but no definite decision has been made. Estimates of costs lay between NOK 50 and 80 million, with completion in 2009 at the same time as Nordre Avlastningsvei. A plan to extend the network by