North Korea Designed A Nuke. So Did This Truck Driver

"This year, deep inside a mountain, North Korea detonated a giant nuclear bomb."

"The weapon was powerful; at least 10 times more destructive than the bomb the U.S. dropped on Hiroshima at the end of World War II. The North claimed it was an advanced, thermonuclear design. The test came just months after a report that some intelligence officials believed North Korea had successfully "miniaturized" some of its nukes in order to fit them on top of missiles."

"The apparently rapid progress alarmed politicians and pundits, and it worried average Americans, many of whom hadn't thought much about nuclear weapons since the end of the Cold War."

"But a 71-year-old truck driver named John Coster-Mullen wasn't surprised. Nuclear weapons are not particularly "hard" to design and build, he says. "Compared to what they do in manufacturing today for making a light bulb, these are simple. They really are," he says."