ISIS' growing foothold in Afghanistan is captured on film.
Inside a counter-terrorism unit in Pakistan that's dedicated to tracking down Taliban suspects.
FRONTLINE correspondent Martin Smith reports from Iraq on the miscalculations and mistakes behind the brutal rise of ISIS.
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Note: Although the American Psychological Association renounced its position that homosexuality was a psychiatric disorder in 1974, there remain many groups dedicated to "curing" gays through various "reparative" or "conversion" therapies.