Were you asleep at mission control during Endeavor's final flight? Did you forget to look to the New York City skyline for the Enterprise's last adventure? Buck up buttercup, there's still one Space Shuttle launch you haven't missed -- a faux Space Shuttle, named Explorer, is prepping itself to ride a barge to NASA's Johnson Space Center in Houston. The full-size shuttle mockup was shuffled out of the Kennedy Space Center Complex to make way