The Pentagon estimates it will cost about $2 billion over the next five years to stand up a Space Force, including $72 million in fiscal year 2020 for a new headquarters, according to a strategic overview document that will accompany the Defense Department's forthcoming legislative proposal. The document, obtained by Inside Defense , outlines the Pentagon's plan to create the new service, which will reside within the Air Force. If Congress approves the legislative proposal, the department expects it...