<answer>Seattle</answer> remained the corporate headquarters of Boeing until 2001, when the company separated its headquarters from its major production facilities; the headquarters were moved to Chicago. The <answer>Seattle</answer> area is still home to Boeing's Renton narrow-body plant (where the 707, 720, 727, and 757 were assembled, and the 737 is assembled today) and Everett wide-body plant (assembly plant for the 747, 767, 777, and 787). The company's credit union for employees, BECU, remains based in the <answer>Seattle</answer> area, though it is now open to all residents of Washington.
Before 2001, where was Boeing headquartered?
Seattle