Between them, Randy Kaplan and Zoltan Marian have collected more than 2000 autographs of heads of states, royals and popes. They share a kind of ethical code, but differ when it comes to who will they include in their collections.
In a matter of days, Jang Song Thaek went from being one of North Korea's most powerful officials to being publicly denounced as "human scum" and then, according to North Korean state-run media, being put to death.
The South Korean government has asked a group to postpone lighting Christmas Trees along the North-South border, as North Koreans mourn the death of their leader, Kim Jong Il. But Seoul hasn't stopped from sending leaflets denouncing Pyongyang.