The nation’s dams, roadways and other public works are aging, and some have faulty construction, but there is debate over funding their repairs and replacements.
Skagit River Bridge — Washington state
A truck bumped against the steel framework of Interstate 5's Skagit River Bridge in Washington state, which collapsed, sending two vehicles and three people into the chilly water. The National Transportation Safety Board called the May 23 incident a wake-up call for the nation. About 71,000 vehicles crossed that span daily.
Stephen Brashear/Getty Images