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David Buecher, program manager, celebrates as he watches the successful landing on Mars of NASA's Perseverance rover is broadcasted at Lockheed Martin Space's Waterton Campus in Littleton, Colo., on Thursday, Feb. 18, 2021. Buecher designed the separation hardware for the heat shield for the Mars 2020 mission and the program manager for the Mars Helicopter deployment system. (Chancey Bush/The Gazette via AP)