The first 737 was the last new airplane to be built at Plant 2 on Boeing Field in Seattle, so it was fitting that the world’s most popular commercial jet would top off a production run that included the B-17 Flying Fortress, the venerable B-52 Stratofortress and the world’s first large swept-wing jet—the XB-47 Stratojet. While the old assembly building at Plant 2 seems cavernous to this day, it still wasn’t tall enough for the 737’s tail, which was attached using a crane in the parking lot. The plane was then rolled down to the Thompson Site, just south of Plant 2 on Boeing Field, where Boeing had set up the first production line for the 737.