Johnson’s interest in North Korea started in 2004, when he first read about the country’s Soviet gulag-style prison camps. As a well-educated professor at Stanford University, Johnson said he was “shocked� at his ignorance—and fascinated by how such brutal concentration camps could still exist in the 21st century without much being done or said about them For more than a year, he read up on North Korea as much as he could, becoming “mildly obsessed� about ...