North Korean secret police are trying to find out who is responsible for anti-government posters being found in towns along the Chinese border. This is a bad sign, and the result of more North Koreans finding out about the outside world. Until the last few years, most North Koreans only knew what the government wanted them to know. They believed that, as grim as North Korea was, it was a "workers paradise," and better than anything else in the world. Now most North Koreans know better, and they are angry. North Korean leaders live in fear of a revolution like that which happened in Eastern Europe in 1989. They are particularly fearful of the Rumanian revolution, where the secret police turned on the leadership (killing many of them) and joining the revolution.