Photos: Falcon 9 breaks apart en route to ISS

The Starlink 10-20 mission will add another 28 broadband internet satellites to SpaceX’s megaconstellation. Liftoff from pad 40 at Cape Canaveral Space Force Station is scheduled at 8:29 a.m. EDT (1229 UTC).

NASA Administrator Jim Bridenstine said this week the space agency is not unduly delaying the debut of new SpaceX and Boeing commercial crew capsules as engineers gear up for a challenging rapid-fire sequence of test flights in the next few months, all against the backdrop of in-depth safety reviews before clearing the privately-owned ships to carry astronauts.

A hold-down test-firing of a Falcon 9 rocket Friday at Cape Canaveral marked a major step in preparations for SpaceX’s 13th mission of the year, scheduled for liftoff Monday with a commercial communications satellite.