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ET-94 paperwork NASA and California Science Center officials pose with a signed placard that outlines the ownership transfer of the last unflown space shuttle external fuel tank, ET-94. From left: Bobby Watkins, NASA Michoud Assembly Facility director; Parker Counts, NASA; Jody Singer, NASA Marshall Space Flight Center deputy director; Jeff Rudolph, California Science Center president and CEO; Jeanette Epps, NASA astronaut; Steve Cash, NASA; Dennis Jenkins, California Science Center. Jason Davis / The Planetary Society