Despite a crowded news agenda, North Korea has managed to draw the attention of both political leaders and the public at large. Missile tests, an assassination employing VX nerve agent, and preparations for a nuclear test have drawn strong reaction from Washington to Kuala Lumpur. Each new controversy sends policymakers scrambling for a response and, more often than not, that response has been a call for new and tougher sanctions. And not surprisingly, each new call for sanctions resurrects the old question: do sanctions on North Korea have any impact?