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 last time North Korea had a transition of power, people in the South feared the outbreak of war. Now they're taking it in stride. And as Jason Strother reports, some see the change as an opportunity for South Korean business.