Economy of London project is construction of 42 km (26 mi) of new tunnels connecting stations in central London including a branch to Canary Wharf in east London. It is Europe's biggest construction project with a £15 billion projected cost. An additional line, Crossrail 2, has been proposed. London is served by six international airports which are the world's busiest city airport system by passenger traffic. These are Heathrow, Gatwick, Stansted, Luton, London City, and Southend. There are a number of proposals for expanding airport capacity for London including expansion of London Heathrow Airport and expansion of Gatwick Airport. The principal argument in
Philip S. W. Goldson International Airport Forces, among others. Price Barracks is a military installation located just north of the airport, which was formerly known as Airport Camp, the Headquarters of British Forces Belize. Philip S. W. Goldson International Airport Due to the Belizean–Guatemalan territorial dispute, Philip S. W. Goldson International Airport, (formerly Belize International Airport) has hosted several military units over the years since its construction. In 1984, a senior US Air Force General stated that it was "the best defended airfield in Central America". Most notable residents have been Headquarters British Forces Belize, No. 1417 (Tactical Ground Attack) Flight RAF operating Harrier Jump Jets,