of the nation's major terminals the airplanes themselves began an remarkable revolution from the landmark dc 3 to the four-engine dc-4. the planes quickly began to defy the imagination with their size, speed and even luxury. from the lockheed constellation to boeing's double-decker strato cruiser. the jet ainge was not far away and in just a few years, san francisco's beautiful little terminal was much too small. a new terminal was built and dedicated in 1954. the airport's first true jetliner arrived four years later. the boeing 707. >> and that is it for this week's "a second look." i'm frank somerville and we'll see you again next week.