It's been less than a year since "Citizenfour," Laura Poitras's unflinching look at Edward Snowden's final days before blowing the whistle on NSA surveillance, premiered at the New York Film Festival and then won the Best Documentary Oscar. The journalist turned filmmaker, now up for four Primetime Emmys, still has work to do. "I haven't had a lot of down time, I can tell you that," Poitras, who likes to keep her whereabouts a mystery, said over the phone.