Countdown to Zero DayBy: Kim Zetter A top cybersecurity journalist tells the story behind the virus that sabotaged Irans nuclear efforts and shows how its existence has ushered in a new age of warfareone in which a digital attack can have the same destructive capability as a megaton bomb. Immensely enjoyable . . . Zetter turns a complicated and technical cyber story into an engrossing whodunit.The Washington Post The virus now known as Stuxnet was unlike any other piece