|The Daegu subway fire was a focus event that expanded to a social issue and aroused public attention. In this process, the news media played an important role in moving this event toward a critical agenda. Many professions were mobilized in the process of policy agenda formulation, critically discussed a variety of ideas, and suggested many policy alternatives. These alternatives came from policy changes by means of revisions of and complements to existing policies. The specific evidence of policy change as a result of policy learning is that a new law was passed and new policies were implemented. In the process of debating ideas, the collective interest, the logic of politics as in the impeachment of the President, legal constraints, and organizational resistance to change acted as obstacles to learning, while high attention of the news media and mobilized group advocacy coalitions acted as the most important force to expedite learning. Meanwhile, large scale focus events pushed social issues, and learning information closely related to the policy agenda cycled through accumulation-accrued from past debates.