In California, catastrophe strikes as one of America's most vital intersections is brought down in a raging inferno. In the Australian capital, Canberra, why did a routine demolition turn to tragedy? In Illinois, a pioneering stadium collapses mid-construction. And in Michigan, engineers investigate as a vital highway cracks apart.

In Arizona, a miraculous escape as a railroad inferno takes down a vital river crossing. In California, a trailblazing concert hall cooks up a storm in downtown LA. Disaster unfolds in Ohio, as a driver and her vehicle are swallowed whole. And what caused the pride of the Swedish Navy to sink, less than an hour into its maiden voyage?

In Sweden, tragedy strikes as a landmark bridge is destroyed in seconds. A massive construction disaster at a New Jersey casino. in California, a catastrophic dam failure rips through a community. And unanticipated turbulence forces a rethink for Chicago's newest supertall skyscraper.

In Ohio, a routine bridge demolition over one of America's busiest interstates goes tragically wrong. A catastrophic dam collapse causes a tsunami of destruction in southern California. In Italy, a vital and historic bridge crashes down like a line of dominoes… And in Massachusetts, why was the world's tallest academic library cracking at the seams?

In California, catastrophe cuts one of America's most vital highways in two. A mammoth refinery explodes in Texas, with deadly consequences. In the UK, scientists launch an interplanetary investigation for a missing space probe. And tragedy over the Ohio river, as a giant suspension bridge packed with rush hour traffic crashes into the water.

In New York, a construction crane comes crashing down onto a landmark bridge. Tragedy strikes a titanic TV tower in Texas. In Sweden, Bruce Springsteen fans nearly bring a stadium to its knees. And a massive fail takes out Boston's fresh water supply.