The Alaska Way Viaduct didn't collapse.

In the best of all possible worlds the Viaduct would've collapsed ten years ago today, and it would've collapsed very slowly—very, very, very slowly—so that everyone who was on or near it when the Nisqually earthquake hit could've safely gotten off or out from under the Viaduct before the thing fell down. Then we would've had to live without the Viaduct while we debated what to do about replacing the Viaduct... and we would've realized, like SF did after the 1986 Loma Prieta earthquake brought down the Embarcadero Freeway, that we could get by just fine without replacing our waterfront-killing, noisy, polluting freeway.