A not-so-secret, secret reusable spaceplane operated by the United States Space Force is scheduled to lift off from the Kennedy Space Center in Florida.
The length of the mission wasn't disclosed, but a previous flight lasted years.
The X-37B Orbital Test Vehicle in the encapsulation cell at the Astrotech facility in Titusville, Fla.
The X-37B Orbital Test Vehicle in the encapsulation cell at the Ast... [3507 chars]