NASA: The Quest for Mars

Includes: 1) Mars-The search Begins: Mariner 9 explores from orbit the mystery and splendor of this fascinating planet. Over 7,000 photos attest to the marvel of volcanoes 15 miles high and 100 miles across, plus rift valleys thousands of mile long. 2) The Planet Mars: The success of Viking 1 & 2 lead to Lander's touchdown on the Martian surface and the first opportunity to see the surface of Mars up close.