 After the outbreak of World War II in Europe on September 1, 1939 the terminus became Foynes until the service ceased for the winter on October 5 while transatlantic service to Lisbon via the Azores continued into 1941.During the war Pan Am flew over 90 million miles (145 million kilometers) worldwide in support of military operations.In 1940 Pan Am and TWA began using the Boeing 307 Stratoliner, the first pressurized airliner in service and the first with a flight engineer in the crew.