USA HISTORY

Detailed explanation-1: -The explosion at its Punggye-ri test site had a force, or “yield", of between 100-370 kilotons. A 100 kiloton bomb is six times more powerful than the one the US dropped on Hiroshima in 1945. North Korea claimed this was its first thermonuclear device-the most powerful of all types of atomic weapon.

Detailed explanation-2: -North Korea likely has dozens of nuclear warheads. The question is whether they are small enough to fit on a missile. North Korea has so far performed six underground nuclear test explosions to manufacture warheads that it can place on missiles.

Detailed explanation-3: -Missile experts estimate its range at 8, 100 miles, and say a North Korean ICBM could hit the U.S. mainland less than 30 minutes after launch. Pyongyang is more than 5, 000 miles away from the U.S. West Coast. In January 2021, Mr. Kim outlined a goal of extending the flight range to about 9, 300 miles.

Detailed explanation-4: -North Korea has extracted plutonium, an atomic bomb fuel, from its Soviet-designed nuclear reactor in Yongbyon, north of Pyongyang. It also runs centrifuges to produce weapons-grade enriched uranium, another bomb fuel.