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Workers at Launch Pad 17A on Cape Canaveral Air Station prepare to stack the Mars Global Surveyor spacecraft, mated to its upper stage booster, atop the Delta II launch vehicle that will loft the spacecraft on its interplanetary journey. In this view the Surveyor's solar array panels are clearly visible, as is the spacecraft's boom-mounted high-gain antenna at left. Both are stowed against the spacecraft bus for flight. The booster stage - - actually the third stage of the Delta II -- is lowermost. After stacking and integrated testing are complete, the fairing will be placed around the Surveyor in preparation for liftoff Nov. 6 at the beginning of a 20-day launch period.