Explicit Birational Geometry of 3-FoldsOne of the main achievements of algebraic geometry over the past twenty years is the work of Mori and others extending minimal models and the Enriques Kodaira classification to 3 folds. This integrated suite of papers centers around applications of Mori theory to birational geometry. Four of the papers (those by Pukhlikov, Fletcher, Corti, and the long joint paper by Corti, Pukhlikov and Reid) work out in detail the theory of birational rigidity of