On Thursday, Virgin Orbit won a contract from the Air Force to carry "technology demonstration satellites" on its LauncherOne rocket by early 2019. The LauncherOne rocket will be "air launched" from a modified Boeing 747 called "Cosmic Girl." The contract follows Branson's quiet launch earlier this month of Vox Space, a subsidiary of Virgin Orbit, that will focus on military contracts. While there is plenty of room in space, the launchpad is becoming more crowded. That's good news for the Pentagon as it looks toward increased competition and embracing new technology like reusable rockets to lower launch costs. United Launch...