Launch happened.

Stage 2 separated, ran to near completion, then self destructed. Huge progress.

Vs. test one:

• New launch pad seems to have worked perfectly.
• All 33 booster engines lit, vs. 29 last time.
• All 33 kept running, vs. 27 last time.
• First-ever hot staging attempt vs. failed separation.
• Booster flipped, did boost-back burn, then exploded.
• 2nd stage did most of its 8 minute burn, vs early explosion.
• 2nd stage self destructed.

Huge, huge progress.