| http://www.w3.org/ns/prov#value | - Largely because of the high risks -- and costs -- involved in developing and launching a rocket, the industry remains dominated by defense companies with deep pockets such as Bethesda-based Lockheed Martin and aerospace giant Boeing of Chicago. (Lockheed's space division alone accounts for $8 billion a year in revenue, mostly from NASA and the military, and employs 18,000 people across the country
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