Rewatch the historic launch.
UPDATE 2:42 p.m.: Elon Musk posted this photo of the landing.
UPDATE 9:52 a.m.:
SpaceX successfully launched and landed its Falcon 9 rocket Sunday morning. Part of the rocket returned to Earth, with another part headed to the International Space Station.
ORIGINAL STORY: SpaceX was scheduled to launch a rocket from a historic NASA launchpad Saturday morning. However, after technical difficulties forced a launch delay, the rocket is now set to launch Sunday at 9:38 a.m. EST at Florida's Kennedy Space Center, Reuters reports.
The Saturday launch was canceled with just 13 seconds remaining. SpaceX said there was a problem with the steering system.
The launchpad was last used by NASA in 2011 for its last space shuttle flight. It was used by Apollo 11, the first craft to send humans to the moon.
Btw, 99% likely to be fine (closed loop TVC wd overcome error), but that 1% chance isn't worth rolling the dice. Better to wait a day.— Elon Musk (@elonmusk) February 18, 2017
CEO Elon Musk said the problem was minor, but not worth the risk.
If this is the only issue, flight would be fine, but need to make sure that it isn't symptomatic of a more significant upstream root cause— Elon Musk (@elonmusk) February 18, 2017
He was also concerned it could be a sign of a larger problem.
It means a lot to see the pad just not sit and waste away.
NASA is monitoring the launch and offering SpaceX assistance. Launch integration manager Stephen Payne said NASA would offer feedback on how it would carry out launches differently.
SpaceX's Falcon 9 rocket is heading for the International Space Station, carrying supplies and experiments.
If the launch isn't delayed again, NASA will host a live stream.