Watch the Falcon 9 test fire its engines ahead of Starlink launch (members only)

Speaking publicly for the first time since a Falcon 9 rocket failure that destroyed a Dragon cargo capsule for the International Space Station, SpaceX founder Elon Musk said Tuesday that engineers are still piecing together what happened during the June 28 accident in hopes of announcing more details within a few days.

The Starlink 15-6 mission will add another 26 satellites into SpaceX’s low Earth orbit constellation. Liftoff occurred from pad 4E at 6:54 p.m. PDT (9:54 p.m. EDT, 0154 UTC).

NASA has formally certified SpaceX’s Falcon 9 rocket to launch all but the space agency’s most costly robotic science missions, beginning with a a U.S.-French oceanography satellite set for liftoff from California in July.