N. Korea preparing to close main nuke facility

North Korea told delegates at international nuclear talks on Saturday that it is preparing to shut down its main nuclear facility, South Korea's chief nuclear envoy said, a key step promised in a landmark pact last month. North Korea's delegation told a working group meeting that it has "begun preparations to shut down its Yongbyon nuclear facility," South Korean nuclear envoy Chun Yung-woo told reporters. North Korea also said it will submit a list of its nuclear programs and will disable its nuclear facility "as soon as the right conditions are created," Chun said, without explaining what the conditions were.