Yang Moo-jin, a scholar with the University of North Korean Studies in Seoul, says the North is "playing hard ball".

VOA: standard.2010.05.27

Yang Moo-Jin,is a scholar at Seoul's University of North Korean Studies.

VOA: standard.2009.12.30

While this past year has been a challenge for the opposition Green Movement, senior scholar Gary Sick of Columbia University says that in the aftermath of the election, the Iranian government also faces a huge challenge.

VOA: standard.2010.06.11