Donald Trump added a branch to the U.S. military in his first term and kick-started a $175 billion missile defense initiative in his second with the same impetus in mind: Future wars will be waged from space.

Why it matters: The U.S. is poised to pour hundreds of billions of dollars into a zone of warfare few Americans understand, but that the world's biggest powers are racing to dominate.

Driving the news: Trump announced Tuesday that he was moving Space Command to Huntsville, Alabama, long known as Rocket City. • Moving SPACECOM to Redstone Arsenal, he said, "will help America defend and dominate the high frontier." • "We were losing the race in space very badly to China and to Russia, and now we're far and away No. 1 in space," Trump claimed. "We're [reestablishing] SPACECOM with

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