Watch live: Vice President Pence visits Kennedy Space Center

SpaceX’s Falcon 9 booster is set for liftoff from Cape Canaveral on Sunday morning, but most of the launcher’s ascent into orbit will be under a news blackout at the request of the National Reconnaissance Office, the secretive U.S. government intelligence agency whose mission is riding on the rocket.

Rumbling into the sky from a historic NASA-owned launch pad, SpaceX’s Falcon Heavy rocket — the world’s most powerful present-day launcher — flew for the first time Tuesday, dispatching a road-worn electric Tesla sports car with a spacesuit-clad mannequin nicknamed “Starman” on an interplanetary journey that will reach beyond the orbit of Mars.

Veteran astronauts Soichi Noguchi and Shannon Walker have been assigned to fly to the International Space Station on SpaceX’s second piloted Crew Dragon mission later this year, joining commander Mike Hopkins and astronaut Victor Glover on a planned six-month expedition in orbit.