North Korea denies involvement in Sony hack, demands joint investigation with U.S.

North Korea managed to offer a compromise and a threat to the U.S. in one statement on Saturday, batting away the FBI's accusation that the isolated country is behind the cyberattacks on Sony Pictures. "We propose to conduct a joint investigation with the U.S. in response to groundless slander being perpetrated by the U.S. by mobilizing public opinion," a North Korean spokesman said in remarks reported by Reuters. "If the U.S. refuses to accept our proposal for a joint investigation and continue...