Experts and witnesses of the 1993 federal raid on the David Koresh-led Branch Davidian cult near Waco, TX, review the multiple mistakes from both sides that resulted in 86 deaths.

In 2011, a preventable nuclear meltdown in Japan endanger tens of thousands due to multiple structural failures, a lack of emergency training and a persistent myth of infallible safety.

Physicians and other experts examine the rise of an opioid crisis fueled by greed and misleading claims made by Purdue Pharma, makers of the highly addictive painkiller OxyContin.

Insufficient planning, defiant tourists and months of ignored warnings lead to chaos in May 1980 when Washington's Mt. St. Helens devastates the surrounding area with a lateral eruption.

In 2013, a devastating explosion rocked the Boston Marathon, and experts suggest a lack of security and surveillance allowed two brothers to carry out the terror attack undetected.

Survivors, academics and former public officials dissect the timeline of the Iranian hostage crisis, occupation of the U.S. Embassy in Tehran and failed rescue mission Operation Eagle Claw.

Experts examine how a record-breaking winter storm combined with an unstable power grid led to a catastrophic power failure in 2021 that left millions of Texans struggling to survive.

A comprehensive investigation reveals ten key failures that led to the collapse of Champlain Towers South in 2021, which killed 98 people.