Naval Air Station Keflavik Iceland protested the invasion but asked the populace to treat the occupying force as guests. Following talks between British Prime Minister Winston S. Churchill and President Franklin D. Roosevelt of the United States, Iceland agreed to a tripartite treaty under which United States Marines were to relieve the British garrison in Iceland on the condition that all military forces be withdrawn from Iceland immediately upon the conclusion of the war in Europe. In addition to their defense role, U.S. forces constructed the Keflavik Airport as a refueling point for aircraft deliveries and cargo flights to Europe. With the end of
El Alto International Airport the three biggest airports in the country: El Alto International Airport, Jorge Wilstermann International Airport and Viru Viru International Airport through its subsidiary Servicio de Aeropuertos Bolivianos S.A. (SABSA). In 1999 Airport Group International was purchased by TBI plc. In 2004, the company was acquired by the Spanish conglomerate Abertis, hence taking ownership of SABSA. In February 2013, the Government of Bolivia announced the nationalization of SABSA, taking full ownership and operations of Bolivia's main international gateways. El Alto International Airport El Alto International Airport () is an international airport located in the city of El Alto, Bolivia, west of