The flying public, airlines, and governments will all agree on one date that changed commercial flying: that was September 11, 2001. The first edition of Aviation Law: Cases, Laws and Related Sources, described early consequences of that event, particularly compensation of victims and early tightening of aviation security. Subsequently laws and regulations affecting all aspects of aviation changed so rapidly that it became difficult to set a cut-off date for the second edition. The rapid flow of events made an update urgent. Several gaps in the materials of the first edition became evident as the book was used. The authors filled those gaps, pruned old materials and added much new material describing not only the later developments, but also evolving economics and flight technology. The objective of the case book is to offer a basic handbook for air law practitioners providing them with a starting point for almost any subject they may encounter.