An explosion at the Napp Technologies chemical/pharmaceutical factory in Lodi, New Jersey, kills five workers and unleashes a torrent of black smoke into the morning sky on April 21, 1995. An investigation reveals how a small amount of water led to this fatal manufacturing catastrophe.

Tragedy struck Puerto Rico in November 1996 when a propane gas explosion collapsed a six-story tower with the popular Humberto Vidal shoe store on the first floor. The disaster killed 33 people and wounded more than 80 others.

On July 18, 2022, a vast sinkhole engulfed a residential street in the Bronx, New York, and grew large enough to swallow a van. Experts explain that a massive summer storm overwhelmed outdated storm drain infrastructure, causing this devastating calamity.

Twenty people are killed in Fremont, Nebraska, when the Pathfinder Hotel explodes on the cold Saturday morning of January 10, 1976. An investigation into the tragic gas leak leads underground to where gas lines supply this iconic building in America's heartland.

In Glasgow, Scotland, not one but two disastrous fires in 2014 and 2018 ravaged the distinguished Mackintosh Library, which opened in 1909. The fires destroyed thousands of rare books, journals, and archives. The celebrated architect Charles Rennie Mackintosh designed the library, located at the world-renowned Glasgow School of Art. Experts explore how outdated construction methods and materials contributed to the vulnerability of this esteemed place of learning.

The Spencer Dam, an aging embankment dam on the Niobrara River near Lynch, Nebraska, is overcome by flooding after a devastating bomb cyclone hit the area on March 14, 2019. An investigation reveals that massive chunks of ice unleashed by the superstorm played a critical role in the overtopping and failure of the old structure.

On a snowy morning in Pittsburgh, Pennsylvania, in 2022, a messy commute becomes dangerous when the Fern Hollow Bridge collapses. An investigation reveals how corrosion and other environmental factors contributed to the collapse of this decades-old structure.

A crane collapse at a high-rise construction project in March 2008 left seven dead on a Saint Patrick's Day holiday weekend in Manhattan. An investigation reveals how a shortcut used while raising the crane left the machine swaying in the wind without proper lateral support.

In Puerto Rico, the iconic Arecibo Observatory, a radio telescope nestled into a giant crater, had to close in 2020 after suspension cables holding up a critical 900-ton platform came crashing into the 305 m dish. Experts analyze the cumulative effects that led to the collapse of this awe-inspiring structure, which has been operational since 1963.

Residents along the Pacific Coast Highway (California Highway 1) are cut off from the outside world after a 2017 storm caused the Pfeiffer Canyon Bridge near Big Sur to buckle. Experts reveal how the construction method of the old concrete bridge left it vulnerable to erosion on the steep coastline.