The Best Episodes of Frontline Season 21

When the Twin Towers fell on September 11, 2001, among the thousands killed was the one man who may have known more about Osama bin Laden and Al Qaeda than any other person in America: John O'Neill.

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In December 2001, as American forces blasted mountain hideouts in the Tora Bora region of Afghanistan, hundreds of Al Qaeda soldiers fled seemingly disappearing into thin air. In this 2002 documentary, FRONTLINE investigates what happened to the fighters who survived.

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Each year, six thousand Americans lose their lives on the job. Tens of thousands more are seriously injured or exposed to deadly poisons and carcinogens in the workplace. Yet if one of those workers dies on the job due to a company's willful disregard for federal safety regulations, the maximum penalty his employer faces is just six months in prison. Are America's workplace safety laws tough enough? And are companies being held responsible for protecting the safety of their employees? FRONTLINE investigates workplace safety in one of America's most dangerous industries.

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For many Americans, the most difficult questions about 9/11 were not about politics, military strategy or homeland security. They were questions about God, about evil and about the potential for darkness within religion itself. What was it we saw on Sept. 11? Was it the true face of evil? Was it the face of religion? And where, if one is a believer, was God on that tragic morning?

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