Alex Gibney, the Oscar-winning documentary director (Taxi to the Dark Side), has never shied away from a cover-up or a controversy. Known for tackling unsavory subjects obscured by power and corruption and shedding light on uncomfortable truths through sharp investigative strategies, Gibney has left a lasting mark on the genre. "I am interested in abuses of power and deception, and self-deception," proclaims Gibney, whose Zero Days, a doc about cyber-crime and internet surveillance, celebrates its world premiere in Competition. Taking time away from the red carpet, Gibney joins to discuss how he carefully dismantles his topics to unveil their complex inherent connections. What are the responsibilities of a documentarian to his sources, whose secrets at times must be alternately exposed and protected?