Seattle has two of the longest floating bridges in the world, and in 1990, one of them sank while it was being repurposed. This accident was a classic complex systems failure with a massive PR problem and great documentation. That combination is an excellent frame for talking about incident retrospectives- the good, the bad, the vaguely confusing and unsatisfying, the straight-up horror stories. Come for the interesting disaster story, stay to learn how to find the facts you only find if you know how to be good to people.