'Mind-blowing': the Paralympians exaggerating impairments to win

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.    Featured:  Hagar Cohen, ABC Four Corners investigative reporter