In an effort to build an audience - and credibility - Al Jazeera America has staked its reputation on deep dive investigations and topics that mainstream TV news divisions have largely abandoned amid shrinking news budgets. And The Dark Side fit squarely in that wheelhouse. It was an undercover probe about doping in sports that fingered several high-profile current athletes including the Denver Bronco's superstar quarterback Peyton Manning. But now AJAM finds itself on the hot seat as the sources of some of the allegations have begun to recant amid furious denials from the athletes. "The allegation that I would...