1. Pacific Coast Bridge Collapse

Residents along the Pacific Coast Highway are cut off from the outside world after a storm causes a bridge to buckle. Experts reveal how the construction method of the old concrete bridge left it vulnerable to erosion on the steep coastline

2. Island Observatory Failure

An iconic telescope in Puerto Rico suffers a spectacular collapse.

3. Tower Crane Calamity

A crane collapse leaves seven dead on a holiday weekend in Manhattan.

4. The Fern Hollow Fiasco

A morning commute becomes dangerous when a bridge collapses in Pittsburgh.

5. Nebraska Bomb Cyclone

An aging dam in Nebraska fails after the area is pummeled by a superstorm.

6. Art School Inferno

A distinguished library is ravaged by not one but two disastrous fires.

7. Gas Leak Catastrophe

Twenty people are killed after a hotel explodes in America's heartland.

8. The Bronx Sinkhole

A sinkhole envelops a residential street in the Bronx.

10. Chemical Plant Calamity

An explosion at a chemical plant in New Jersey kills five workers.