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This photo shows the mock-up of the lunar surface, built by Grumman to test the Mobile Base Simulator, (Rover) a 31 ft. prototype vehicle for manned lunar exploration. The "astronaut" is Robert Smyth, a Grumman test pilot, examining the Metalastic wheels of the simulator. The moonscape was constructed of light-reflecting cinder and blast furnace slag and was based on pictures sent back to earth by Ranger 9. This photo was taken at Calverton, NY on December 6, 1966.