Watch the Falcon 9 launch from pad 39A

The planned launch of a SpaceX Falcon 9 rocket Tuesday from Cape Canaveral of a South Korean military communications satellite has been delayed in order to address an issue on the launcher’s second stage, and potentially replace the hardware if necessary, officials said Monday.

United Launch Alliance and SpaceX beat out Northrop Grumman and Jeff Bezos’ Blue Origin for billions of dollars in U.S. military rocket contracts, and will share the load in launching the Pentagon’s highest-priority national security space missions through 2027, officials announced Friday.

Watch as a Falcon 9 rocket lights its nine Merlin first-stage engines at pad 39A at the Kennedy Space Center in preparation for the 18th launch dedicated to SpaceX’s Starlink broadband satellite venture.