This image from the Mars Exploration Rover Spirit hazard-identification
camera shows the rover's perspective just before its first post-egress
drive on Mars. On Sunday, the 15th martian day, or sol, of Spirit's
journey, engineers drove Spirit approximately 3 meters (10 feet) toward
its first rock target, a football-sized, mountain-shaped rock called
Adirondack (not pictured). In the foreground of this image are "Sashimi" and "Sushi"
- two rocks that scientists considered investigating first.
Ultimately, these rocks were not chosen because their rough and dusty
surfaces are ill-suited for grinding.