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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.
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.