ISTANBUL North Korea's leader has called the South a foreign and hostile, warning of “physical” force in response to violations of Pyongyang's sovereignty, state-run media reported Friday. “Our army should keep in mind once again the stark fact that the ROK is a foreign country and an apparent hostile country,” Kim Jong Un said Thursday, according to the Korean Central News Agency, which released the report with images of the North Korean conversing with military staff. He made the comments