 The United States felt that even though Italy subsequently agreed to station the F-16 wing at Aviano Air Base, the cost of transfer would be high, and the unit would be in a more exposed position to Warsaw Pact forces.In January 1988, Spain and the United States announced jointly that agreement had been reached in principle on a new base agreement with an initial term of eight years, essentially meeting the conditions demanded by Spain.The F-16s were to be removed from Torrejón within three years, by mid-1991.