With the Space Shuttle now officially grounded, NASA has been researching alternatives for ferrying astronauts from Earth to the International Space Station, orbiting some 230 miles above the planet. One such vehicle has made its way from Boeing's HQ to the National Space Symposium in Colorado Springs, where a full-size model is on display for conference attendees. Externally, the spacecraft appears very similar to the reentry modules of yesteryear, measuring 14.5 f
