The US government has a substantial role in building prison and border walls internationally. With more people on the move as a result of global warming and displacement, the business of containing them—border fortification—is booming. Not only that, ever more people are being criminalized and incarcerated around the world. Todd Miller, shows us how the world is preparing for mass displacement by fortifying borders, as he demonstrates in his new book Storming the Wall: Climate Change, Migration, and Homeland Security. Nasim Chatha of Alliance for Global Justice will discuss the US role in managing or advising the prison systems of 38 different countries.