Staffing levels may halt the vital pre-launch test.
Rocket Lab's Still Testing rocket successfully reached orbit and deployed Earth-tracking satellites.
Insurance expert says taxpayers will likely foot the bill.
The contents include plants, fiber optics and even mice.
Experts weigh in on the mystery.
The secret craft could have plunged back through the atmosphere.
It's scheduled to begin at 8:00 p.m. EST.
Even Elon Musk hasn't revealed the restricted Zuma contents.
Elon Musk is a very rich man.
Keep your eyes on the road.
It's a comet! It's aliens! No, it's Tesla!
The SpaceX founder joked with confused Twitter users saying his Falcon 9 rocket was a nuclear alien UFO from North Korea.
The rocket was initially supposed to launch back in 2013, but it looks like SpaceX is finally approaching a launch date in early 2018.
Three more astronauts have arrived at the International Space Station.
The astronauts also have plans to see the new "Star Wars" movie.
Friday's Falcon 9 launch and landing was succesful, perhaps ushering in an age of reusable rockets.
"No one was injured and all safety protocols were followed during the time of this incident," read a statement. "We are now conducting a thorough and fully transparent investigation of the root cause."