Wenner is an American artist best known for his highly realistic, three-dimensional street art drawn using chalk. He produced his first chalk drawings on sidewalks in Rome after moving there in 1982 to study classical art. While he is not the only artist to have created anamorphic illusions in chalk, Wenner transformed the art form with his Renaissance-style mythical and religious scenes. He has also created advertisements. What work did Wenner do for NASA before studying in Rome? Discuss
Source: The Free Dictionary