In this clip from the My Perestroika lesson plan, a group of Russians describe how they felt during the beginning of Gorbachev's perestroika. Openness and reform were ushered into the USSR and would become pivotal to the country's history.
In this chilling video, Pol Pot's second in command, Nuon Chea (a.k.a. "Brother Number 2"), describes the decision they made to eliminate perceived "traitors" while they were in power. It's the first time a leader of the Khmer Rouge has admitted to ordering the killing of Cambodian people.