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Dwayne Allen Day
Dwayne Allen Day is an American space historian and policy analyst and served as an investigator for the Columbia Accident Investigation Board. Day is a senior program officer for the Aeronautics and Space Engineering Board of the National Research Council (United States), National Research Council/National Academy of Sciences, where he has served as a study director on studies concerning NASA's aeronautics flight research capabilities, the planetary exploration program, the size of the astronaut corps, the threat of asteroids striking Earth, NASA workforce skills, radiation hazards to astronauts on long duration spaceflights, U.S. Air Force astrodynamics standards, and other projects. He previously served as a program officer on the Space Studies Board. He has also written extensively on the history of American satellite reconnaissance. Career He received a doctorate degree in political science from The George Washington University [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |