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"Accessory to War": Neil deGrasse Tyson talks militarization of space

Could a sixth "space force" military branch actually be necessary, as President Trump has called for? The Pentagon says it will help accelerate space technology and advance America's scientific knowledge. Astrophysicist Neil deGrasse Tyson joins "CBS This Morning" to discuss his new book, "Accessory to War: The Unspoken Alliance Between Astrophysics and the Military," which examines the militarization of space.
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