Holy crap - go to Fox News and check the live stream now: the 35W bridge collapsed, and there's a live stream of the disaster. Happened right at rush hour, too.
Update: Pictures grabbed from this news site. The roadway collapsed, something like 50 cars down, some in the Mississippi. Sounds like it's a structural failure of some kind (the bridge has been under repair). Looks really, really ugly - this is apparently one of the busiest roads in Minneapolis.
Update 2: 8:15 PM - some of the vehicles that got dropped are on fire now. This is about as bad as this kind of thing could be. Some of the images of cars suspended on the edge of the remaining bridge look like scenes from a disaster movie.
Update 3: 8:20 PM - Ok, it could get worse - there are storms in that region - thunderstorms. This is going from bad to worse in a hurry.
Update 4: 8:45 PM - Wonder if this is related to the bridge rehab work that was going on. From the Strib last week:
The road closing and lane restrictions are necessary so crews can continue a bridge repair and concrete rehabilitation project that is scheduled to be completed in September.
I don't know enough about the subject to know whether the phrase "concrete rehabilitation" is meaningful or not...