The collapsed Interstate-5 bridge is seen at dusk submerged after collapsing into the Skagit River, dumping vehicles and people into the water, in Mount Vernon, Wash., Thursday, May 23, 2013. (AP Photo/Elaine Thompson)

Associated Press
The collapsed Interstate-5 bridge is seen at dusk submerged after collapsing into the Skagit River, dumping vehicles and people into the water, in Mount Vernon, Wash., Thursday, May 23, 2013. (AP Photo/Elaine Thompson)
The collapsed Interstate-5 bridge is seen at dusk submerged after collapsing into the Skagit River, dumping vehicles and people into the water, in Mount Vernon, Wash., Thursday, May 23, 2013. (AP Photo/Elaine Thompson)
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