The launch of the Falcon 9 rocket carrying a mystery satellite with the code-name "Zuma" has been rescheduled to liftoff at 8:00 p.m.
Wednesday's launch is scheduled to occur from KSC's historic Launch Pad 39A - the former site of Apollo moon mission and space shuttle liftoffs - during a 2-hour window that opens at 8 p.m. EST (0100 GMT on November 16).
"There is the possibility that residents of Brevard, Orange, Osceola, Seminole and Volusia counties may hear one or more sonic booms during the landing attempt", an advisory read. Falcon 9 rocket will return to Landing Zone 1 at the Cape Canaveral Air Force Station. Prior to this mission SpaceX has landed the first stage booster at Landing Zone 1 seven times.
The covert haul is due to launch between 8pm and 10pm EST from NASA's Kennedy Space Center on Merritt Island, Florida.
The Zuma mission will be SpaceX's 17 launch this year.
Cumulus clouds could be the main restrictions for the launch, which is given a 70 percent chance of being a "go".
On October 19, U.S. defense tech and aerospace company Northrop Grumman confirmed that they commissioned SpaceX for the low-Earth orbit launch, stating that it was a government mission without disclosing further details.