As Americans celebrate President Barack Obama's second inaugural and Martin Luther King Jr. Day — events that symbolize the power of human freedom and perseverance against oppression — for many others such freedom is a distant dream.

Among the most repressive countries in the world, North Korea holds as many as 200,000 people in the vast gulag system known as the kwan-li-so. Under the guilt-by-association system established during the dictatorship of Kim Il Sung more than 50 years ago, real and imagined dissenters and as many as three generations of their relatives are punished to eliminate "the seeds" of bad families.

Those imprisoned have almost no hope for release, and it is nearly impossible to escape the camps, meaning these people are almost guaranteed to die as prisoners. Over the past few decades, hundreds of thousands have perished, the Committee for Human Rights in North Korea estimates.