A rare SpaceX Falcon Heavy is set to kick off a doubleheader launch day from Florida. Here's what to know before liftoff.
SpaceX and United Launch Alliance are preparing for a rare doubleheader launch day from Florida.
A SpaceX Falcon Heavy rocket is set to launch no earlier than 10:21 a.m. Monday, April 27 from Pad 39A at NASA's Kennedy Space Center.
SpaceX has until 1... [956 chars]