James Lewis, director of the Center for Strategic and International Studies(CSIS) in Washington D.C, narrates a large scale Cyber attack against the United States of America:

“In 2007, we probably had our electronic Pearl Harbor. It was an espionage Pearl Harbor. Some unknown foreign power, and honestly, we don’t know who it is, broke into the Department of Defense, to the Department of State, the Department of Commerce, probably the Department of Energy, probably NASA. They broke into all of the high tech agencies, all of the military agencies, and downloaded terabytes of information.”

The correspondent asked: “How much is a terabyte?”

“The Library of Congress, which has millions of volumes, is about 12 terabytes. So, we probably lost the equivalent of a Library of Congress worth of government information in 2007,” Lewis explained.