Inside North Korea ahead of purported dismantling of nuclear site About two dozen journalists from the U.S., U.K., China and Russia are in North Korea to witness the planned dismantling of a major nuclear test site. CBS News is the only U.S. broadcast network in the group. This comes as North Korea is lashing out at the U.S. and South Korea over joint military exercises and the U.S. taking credit for the diplomatic breakthrough. Ben Tracy reports from Wonsan, North Korea.