The 9-11 attacks resulted in heightened security efforts in American ports. Any attack on a seaport would be far more disruptive to the day-to-day functions of the country than even airport closures. Much of the responsibility for increasing port security fell to the U.S. Coast Guard. In this book, Harvard Kennedy School authors focus diverse conceptual lenses on a single high-stakes management challenge – enhancing U.S. port security. The aims are two: to understand how that complex challenge might plausibly be met and to explore the similarities, differences, and complementarities of their alternative approaches to public management.