Bridge Collapse caused by huge piece of steel hitting span.

The collapse of the Interstate-5 bridge over the Skagit River in Washington State was triggered by an oversized truck hitting its steel span, sending two vehicles into the icy water 50-feet below, Washington State Patrol Chief John Batiste said Friday.

Three people were hospitalized with non-life threatening injuries Thursday evening, but there were no fatalities.

http://www.usatoday.com/story/news/nation/2013/05/24/bridge-washington-state-collapsed-truck/2357389/