The countdown continues toward liftoff at 12:31 p.m. EDT, 10 minutes from now. During this time, the Falcon 9’s engines will be chilled to condition them for launch, the strongback support structure will be moved away from the rocket, the flight computer will run its prelaunch checks and the rocket’s propellant tanks will be brought to flight pressure. Finally, SpaceX Launch Director Mike Taylor will verify “go for launch.”