Investigators are examining a crumbled heap of twisted metal in the Skagit River that used to be part of bridge on Interstate 5 - just north of Seattle.
Thursday night, a 150 yard chunk of that bridge suddenly collapsed, dropping 120 feet into the frigid waters below - taking with it two cars and three people.
Police say it appears an oversized truck may have struck a steel beam above the roadway and that may have triggered part of the bridge which was built-in 1955 to collapse.
For years, we have been warned, our country's infrastructure is falling apart.
The American Society of Civil Engineers estimates that about 151,000 or 1/4 of our bridges are either obsolete or long overdue for a replacement.
OutFront tonight: Jeremiah Thomas, Volunteer Firefighter.