Expert: N. Korea still years away from viable nuclear ICBM Pyongyang had test-fired an intercontinental ballistic missile which had a probable range of over 5,500 kilometers (3,400 miles), enough to reach Alaskan shores. But according to Frank Aum, Visiting Scholar at U.S.-Korea Institute at Johns Hopkins, North Korea is still years away from developing nuclear ICBMs. IMAGES AND SOUNDBITES