NSA denies Facebook snooping

 An article that accused the National Security Agency of impersonating Facebook to spy on U.S. citizens has triggered a denial from the NSA and a reprimand for the U.S. president from CEO Mark Zuckerberg.

The article, which also said the NSA plans to infect millions of PCs with malware, appeared on the website First Look and was co-written by Glenn Greenwald, who shot to prominence last year for a series of articles in the Guardian about classified NSA documents leaked by Edward Snowden.