Last week's rejection of the monorail reminds us of an earlier failure by Seattle to produce cool futuristic transport -- no, not the Jetfoil. We're talkin' SST. On September 29, 1966, Boeing unveiled a full-scale mockup of its supersonic airliner, capable of blasting 274 passengers around the globe at 1,800 mph. Boeing first studied commercial SST use in 1952, and officially began its SST program in 1958. By1963, to compete with the British-French consortium......