sentences:  It was used by 60,000 passengers during the first year of its operation.1978 was also the year BCal set up a task force headed by Gordon Davidson, BA's former Concorde director, to investigate the possibility of operating the Concorde supersonic airliner viably on the airline's long-haul route network as there were still two unsold, "white tail" examples available at that time.Another important reason for BCal's decision to set up a Concorde task force was that the 1976 aviation policy review had exempted Concorde from the "spheres of influence" policy and therefore it was possible for BA to operate supersonic services to prime business and leisure destinations within BCal's sphere of influence, such as Lagos or Rio de Janeiro for example.