A 7-time Tour de France champion and cancer survivor advocate, Lance Armstrong's fame skyrocketed in the late 1990s and early 2000s. Then, it plummeted when he admitted to doping and to lying about it. In the new 30 for 30 film "LANCE," director Marina Zenovich explores Armstrong's own story of what happened, alongside accounts from teammates, journalists and those close to him. Zenovich tells Mina Kimes what it was like to conduct hours of interviews with Armstrong, and how the film aims for new territory around his very public rise and fall.