Which state-owned entity operates Norway's second-busiest airport, located just south of Grimstadfjorden?
Grimstadfjord:  The Grimstadfjorden lies just north of Bergen Airport, Flesland and the Norwegian naval base Haakonsvern lies on the northern shore of the fjord. Bergen Airport, Flesland: Bergen Airport, Flesland (Norwegian: "Bergen lufthavn, Flesland" ; IATA: BGO, ICAO: ENBR ) is an international airport located at Flesland in Bergen, a city and municipality in Hordaland county, Norway. Bergen Airport, Flesland:  Opened in 1955, it is the second-busiest airport in Norway, with 6,078,589 passengers in 2014. Bergen Airport, Flesland:  Flesland is operated by the state-owned Avinor.
Avinor