In December 1994, a group of Mars Pathfinder team members gathered for a photo with the Sojourner Rover model. In December 1994, a group of Mars Pathfinder team members gathered for a photo with the Sojourner Rover model. They were working on rover technology development efforts about two years before the anticipated launch date. The Office of Mars Exploration sponsored presentations, booths, and demonstrations of technology from Mars Pathfinder and Mars Global Surveyor. TAGS:MARS, PATHFINDER, ROVER, TEAM, 1994