Despite the launch scrub of Space Shuttle Mission STS-88, Commander Robert D. Cabana has a big smile as he returns to the crew quarters in the Operations and Checkout Building. Behind him in the astronaut van is Pilot Frederick W. "Rick" Sturckow. The Space Shuttle Endeavour is slated to make another liftoff attempt on Friday, Dec. 4, for the first U.S. mission dedicated to the assembly of the International Space Station