Following a report released last week from U.S. intelligence officials on cyber espionage, James Lewis, director of the CSIS Technology and Public Policy Program, says it was a “breakthrough report because it came out and said what people have known on a classified level for several years and that is Russia and China are our most vigorous opponents in cyberspace.”

Ultimately, cyber espionage will become the biggest threat to the U.S. economy in the next several years, said Lewis.