Kim Zetter is an American investigative journalist and author who has covered cybersecurity and national security topics since 1999. Throughout her career, she has broken numerous significant stories about NSA surveillance, WikiLeaks, and the hacker underground. Her work has earned recognition from her peers, and she has been voted one of the top ten security journalists in the U.S. three times by journalism peers and security professionals. Zetter is widely recognized as one of the world's leading experts on Stuxnet, the malicious computer worm that was used to sabotage Iran's nuclear program. She published a comprehensive book on the subject titled Countdown to Zero Day: Stuxnet and the Launch of the World's First Digital Weapon. In addition to her coverage of major cybersecurity threats, she has produced an award-winning series investigating security vulnerabilities in electronic voting machines.