PYONGYANG, North Korea (AP) — North Korea has stepped up measures to prevent the spread of the Ebola virus into the reclusive country, state media reported Thursday, while a travel agent that specializes in North Korean tours said it has been informed that Pyongyang may ban foreign tourists from visiting. Koryo Tours posted an announcement on its Twitter and Facebook accounts saying it has been told that no foreign tourists would be allowed into North Korea beginning Friday.Read more on NewsOK.com