I watched the film on the Skagit River bridge collapse on ABC. I'm no expert, but the steel beams in that bridge sure look lightweight. Too lightweight to be part of the interstate system.

As for the truck that hit the bridge (where is this alleged truck?), we all know that sometime, some year, some truck is going to hit any given bridge. If nothing else, bridges get ice on them before roads do, and vehicles go out of control. It's just something that engineers need to design for and governments need to pay for.

By the way, the bridge is in Washington State, in the Seattle area, on I-95, and it was built in 1955.