The Paralympics have transformed the sporting arena for those with disabilities, but now the integrity of the event has been brought into question. 

A Four Corners investigation has uncovered allegations of athletes exaggerating or even lying about their impairments to give them a better chance of winning. 

Today, investigative reporter, Hagar Cohen, on how the rules are being bent and broken, to the determinant of the majority of competitors doing the right thing.   

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Hagar Cohen, ABC Four Corners investigative reporter