When President Trump signed a $738 billion defense spending bill on Friday, he officially created the Space Force. It's the sixth branch of the U.S. Armed Services, and the first new military service since the Air Force was created in 1947.
"Space is the world's newest war-fighting domain," President Trump said during the signing ceremony. "Amid grave threats to our national security, American superiority in space is absolutely vital. And we're leading, but we're not leading by enough. But very shortly we'll be leading by a lot."