Will the world's next war be fought in cyberspace?"e;It's going to happen,"e; said former National Defense University Professor Dan Kuehl. So much of the world's activity takes place on the internet now including commerce, banking and communications- that the Pentagon has declared war in cyberspace an inevitability. For more than a year, Washington Post reporter Robert O'Harrow has explored the threats proliferating in our digital universe. This ebook, ZERO DAY: THE THREAT IN CYBERSPACE, is a compilation of that reporting. With chapters built around real people, including hackers, security researchers and corporate executives, this book will help regular people, lawmakers and businesses better understand the mind-bending challenge of keeping the internet safe from hackers and security breaches- and all out war.