On the Cover: The Mars Rover reaches the boulder-strewn summit of Mars Hill-in Death Valley, California. The 1992 Planetary Society test program brought together Russian, American, French and Hungarian engineers and scientists who matched the little robot explorer against some of the most Mars-like terrain on Earth. The program marked the first time a private space organization involved the public in the actual tests of a craft designed to explore another world. Charlene M. Anderson
4 To Mars on the Back of a Giant Snake: James Cantrell tells the story of this martian balloon mission.
10 Mars Observer: On Its Way: Charlene Andersongives a status update on NASA's return to the Red Planet.
12 Through Teamwork to Mars: The 1992 Mars Rover Tests: Charlene Andersonprefaces a collection of articles by participants in this monumental mission: