That's more than all the spacecraft currently orbiting Earth combined.
Is this secret satellite missing, or not?
We still know very little about its destination and mission.
Nope, not a UFO.
Ready for takeoff.
This is SpaceX's most secretive payload yet.
Elon Musk's space company set a new personal best.
See history as it happens.
The engine can be scaled, but is it safe?
They'll follow it up with another launch in just two days.
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