As borders become increasingly fluid in a globalized world, border security remains at the heart of public and policymaker concerns about immigration.This volume brings together perspectives from both sides of the Atlantic on what border security means in practice. It addreses the challenges that continue to evade policymakers and assesses which policies have been most - and least - successful in achieving “secure” borders while also allowing for the movement of people and commerce. From border dynamics and drug trafficking in Central America to challenges to the asylum regime in Europe, this book offers a thought-provoking and well-rounded account of how borders are interpreted and managed in diverse settings.