Siegfried Hecker, the former director of the Los Alamos National Laboratory, reflected on his frequent visits to North Korea's Yongbyon nuclear facility in a recent interview with Kyodo News.Hecker, a world-class nuclear scientist with profound knowledge about the isolated state's nuclear program, visited Yongbyon four times from 2004 to 2010.Yongbyon, a main center part of North Korea's nuclear material production activities, was one of the main subjects during the recent Hanoi summit meeting between U.S. President Donald Trump and North Korean leader Kim Jong Un, who tried to achieve comp…READ FULL ARTICLE