Agreement on the Rescue of Astronauts, the Return of Astronauts and the Return of Objects Launched Into Outer Space, © published by S.M. Kessler, Hicksville, New York, undated

The Continuing NASA Involvement subseries spans the nearly four decades of Armstrong’s life following his resignation from NASA in 1971. After leaving his position as the Deputy Administrator of Aeronautics, Armstrong was no longer employed by NASA in any official capacity. However, Armstrong remained in touch with his many colleagues at NASA and continued to be involved in projects related to space flight and aeronautics. His continued commitment to the U.S. space program is reflected in a series of correspondence, presented here as Armstrong himself had arranged it. The subseries also contains work on which Armstrong collaborated with University of Arizona and Altair project members working on improvements to lunar lander technology, as well as materials documenting conferences on spaceflight that Armstrong helped to plan and which he attended or participated. Conference materials include multimedia presentations delivered by Armstrong as part of a panel of experts in 2007. Correspondence related to the planning of these events has been preserved as Armstrong himself arranged it.