The National Security Agency has at times mistakenly intercepted the private email messages and phone calls of Americans who had no link to terrorism, requiring Justice Department officials to report the errors to a secret national security court and destroy the data, according to two former U.S. intelligence officials.

via Officials: NSA mistakenly intercepted emails, phone calls of innocent Americans – Open Channel.

This BS line reminded me of a great line from the movie The Last Boy Scout:
[Joe has just found out that Mike was sleeping with his wife]
Mike Mathews: It just happened, Joe. It…
Joe Hallenbeck: Sure, sure, I know… it just happened. Coulda happened to anybody. It was an accident, right? You tripped, slipped on the floor and accidentally stuck your dick in my wife. “Whoops! I’m so sorry, Mrs. H. I guess this just isn’t my week.”

And has the same amount of credibility.