In the same report, which is dated July 28, the DIA estimated that North Korea
possesses as many as 60 nuclear weapons. This is significantly higher than an estimate made by Siegfried Hecker, who is regarded as one of the US's leading nuclear experts. In an article published on North Korea
n affairs website 38 North in Sept. 2016, Hecker said that North Korea
has "a stockpile of sufficient fissile material for approximately 20 bombs by the end of this year ." And in April 2017, David Albright, president of the Institute for Science and International Security (ISIS), estimated that North Korea
had 30 nuclear weapons by the end of 2016.