The size of the crew varies depending on the mission needs but seven is the normal crew size. The earliest flights only had a crew of two. This size grew to five and more recently a crew consists of...
6 in total were produced, 3 are still operational today:
Enterprise - was a prototype designed to test Space Shuttle behavior in atmospheric flight.
Columbia - first launched on April 12, 1981. On...
it really depends. i have alot of answers for this question. in fact too many to write, or in this case, type down. but if you just email me and tell me specifically what you mean, I'm assured to...