North Korea’s nuclear arsenal has expanded to 30 warheads and will grow further as Pyongyang produces increased quantities of weapons-grade uranium and plutonium, according to estimates. In just three years, the North’s unpredictable leader, Kim Jong-un, will control sufficient fissile material to double that arsenal to as many as 60 weapons, says the Institute for Science and International Security in Washington. To underscore this alarming increase, the U.S. estimated that North Korea owned just one or two nuclear weapons in 1999 and would have 10 or more by 2020, according to a secret Defense Intelligence Agency report obtained by The Washington Times shortly after it had circulated privately last decade. “The bottom line is that North Korea has an improving nuclear weapons arsenal,” said David Albright, founder and director of the Institute for Science and International Security. “The last several years have witnessed a dramatic and overt buildup in North Korea’s nuclear weapons capabilities.” The numbers show that North Korea is becoming a true nuclear power with the ability to hit its neighbors and, one day, the U.S. Analysts say the North’s objective is simple: Assure the communist state’s, and thus the Kim dynasty’s, survival and coerce U.S. allies South Korea and Japan.