Zero Days is a 2016 American documentary film directed by Alex Gibney that investigates the creation, development, and impact of the Stuxnet worm, a sophisticated cyber weapon attributed to the United States and Israel, designed to sabotage Iran's nuclear program at the Natanz facility. The film blends interviews with experts and officials, archival footage, and dramatic reconstructions to examine the origins of cyber warfare, the involvement of intelligence agencies like the NSA and Unit 8200, ethical implications of state-sponsored hacking, and the broader geopolitical ramifications, including escalation risks in digital conflicts. It premiered at the 66th Berlin International Film Festival, where it competed for the Golden Bear, and received critical acclaim for its investigative depth and timeliness in highlighting the shift from physical to cyber battlefields.