WARNING: A fake news page saying, 'U.S. attacks Iran and Saudi Arabia, the begin of World War 3,' is the latest virus scam to circulate on Facebook. The story uses CNN's logos, and appears to offer video footage of a breaking news story, but says users need to upgrade their Flash video software to watch. When they 'upgrade', they in fact infect their PC with a trojan. Security experts Sophos reported at least 60,000 people have already fallen victim. Cyber criminals have begun using fake news headlines to lure in victims on social networks such as Facebook.