Are North Korean nuclear weapons being relocated near the border with South Korea?

Is North Korea planning to place tactical nukes along its border with South Korea, which is barely a day's drive from Seoul and its 26 million residents?

Many observers of a high-profile military summit in North Korea this week have reached that conclusion. The prospective deployment would be a dramatic turning point in the decades-long confrontation on the Korean Peninsula, coming as it does barely two months after a veiled thre....