U.S. officials aware of CIA security breach in 2016, say WikiLeaks papers authentic

By John Walcott and Andrea ShalalWASHINGTON/BERLIN (Reuters) - U.S. intelligence and law enforcement officials said on Wednesday that they have been aware since the end of last year of a security breach at the CIA that led to anti-secrecy group WikiLeaks publishing agency documents on its hacking tools.The officials, who asked not to be identified, told Reutersthat they believed that the documents published by WikiLeaks on Tuesday were authentic.Investigators were focusing on CIA contractors as