"Many arms control specialists believe that, by 2020, North Korea could have the capacity to launch a miniaturized nuclear device on an ICBM, with the range to strike at least the West Coast. It might even have that capability sooner."
http://www.mcclatchydc.com/news/nation-world/national/national-security/article131808834.html
http://www.mcclatchydc.com/news/nation-world/national/national-security/article131808834.html