title: 29th Annual Harry G. Armstrong Lecture: the human space enterprise in the 21st century.
authors.affiliation: Office of Life and Microgravity Sciences and Applications, Washington, DC.
authors.forename: A E
authors.initials: AE
authors.lastname: Nicogossian
mesh_terms: D000337:Aerospace Medicine / Q000639:trends*; D005101:Expeditions / Q000639:trends*; D005544:Forecasting; D006801:Humans; D013026:Space Flight / Q000639:trends*