" There are six camps, according to South Korea’s intelligence agency and human rights groups. The biggest is thirty-one miles long and twenty-five miles wide, an area larger than the city of Los Angeles. Electrified barbed-wire fences—punctuated by guard towers and patrolled by armed men—encircle most of the camps. "

― Blaine Harden , Escape from Camp 14: One Man's Remarkable Odyssey from North Korea to Freedom in the West