When I first interviewed Oscar-winning documentary maker Alex Gibney, he enthusiastically talked up one of his pending projects, in two words, “Lance Armstrong.” The second time around, a year later, Gibney was biting his tongue. Having picked up his cameras in good faith and followed the cyclist on what was meant to be his sporting comeback of 2009, Gibney was one of the millions who then sat still and watched while Armstrong unburdened himself – sort of – to Oprah.