Space stations International cooperation 35 Appropriations and expenditures 29 Design and construction 18 Costs 17 Exploration 17 Astronautics 16 Astronautics and state 13 Government policy 13 Science 13 Research 12 Space sciences 12 Space shuttles 11 Armed Forces 9 Space industrialization 8 Exploration of outer space 6 Reorganization 6 Space flight 6 Technological innovations 6 Management 5 Manned space flight 5 Biology 3 Cost control 3 Disclosure of information 3 Extravehicular activity (Manned space flight) 3 Finance 3 Forecasting 3 Government contractors 3 History 3 Medicine 3