(10/15/1997) -- In preparation for the next pre-launch stage for Space Shuttle Mission STS-87, the orbiter Columbia begins to roll from the Orbiter Processing Facility. The orbiter will be mated to the external tank and solid rocket boosters over the weekend and is slated to roll out to Pad 39B on Wednesday. STS-87 will be the fourth flight of the United States Microgravity Payload and the Spartan-201 deployable satellite.