We are thrilled to welcome Margaret Weitekamp, Curator and Department Chair of the Smithsonian National Air & Space Museum, to discuss science fiction's role in the story of space flight. A 1972 letter from Gene Roddenberry to Fred Durant, Assistant Director of NASM, underlines the cultural impact of shows like Star Trek and the importance of heroic stories in garnering public support. See the documents: facebook.com/thetrekfiles Visit the Trekland site for behind-the-scenes access and exclusive merchandise.