SpaceX launches the Falcon Heavy X-37B space plane Sunday night at KSC
After the Space Force’s robotic X-37B orbital test vehicle relaunches Sunday night, what kinds of classified payloads will it carry into space? What unclassified military space plane performs more than 150 to 500 miles above Earth’s surface? That’s how long the black-and-white miniature space shuttle will stay in orbit — its last marathon flight lasted…