QUESTION:
How can you drive the rover based upon an image that takes so long to came
to Earth?

ANSWER from Pieter Kallemeyn on July 28, 1997:
The rover is driven _very_ slowly and precisely, and only after careful
analysis of the last picture taken.  Also, the rover will stop automatically
if it thinks it has detected a hazard.  So the 10-12 minute time lag is no
problem.

It's very much like driving blindfolded in a parking lot, but you drive
slowly only a few feet at a time, you're allowed to peek every so often, and
you have a very good visual map of the parking lot inside your head.

Pieter Kallemeyn