Meet the war-fighters of the future. Correspondent Tom Costello goes inside Space Force, the newest branch of the U.S. Military, gaining exclusive access to the classified, nuclear-hardened facilities where Space Force operates America’s constellation of satellites in Earth orbit – now threatened by hostile, armed Russian and Chinese spacecraft. “Battlefield Space,” an exclusive NBC News documentary examining what the Pentagon says is likely the next conflict zone. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
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