Re-entry vehicle last-remaining part for N.K. ICBM: U.S. expert say

WASHINGTON, June 11 (Yonhap) — Building a nuclear warhead and a re-entry vehicle durable enough to withstand the extreme heat during a missile’s re-entry into the atmosphere is the last-remaining major question North Korea faces in developing a nuclear-tipped intercontinental ballistic missile, a U.S. expert said.Jeffrey Lewis, a top expert on North Korean missiles, also said in an article in the Foreign Affairs magazine that the North’s Hwasong-12 missile, test-fired last month, showed that its warhead experienced heat loads similar to those of an ICBM and survived.Mastering warhead miniaturization, as well as re-entry technologies, have long been considered two major challenges Pyongyang must overcome if it wants to develop a nuclear ICBM capable of striking the continental U.S.Lewis said the North appears to have overcome the miniaturization problem.”North Korea almost certainly has a compact fission warhead capable of fitting on a future ICBM,” he said in the article, adding that with five nuclear tests, the North’s claim of mastering miniaturization is in line with the progr

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