This podcast from Transport Security International Magazine explains the technology used to screen cargo containers at ports and border crossings. The podcast focuses on the use of non-intrusive inspection (NII) systems, such as large-scale X-ray and gamma-ray machines, to detect contraband without the need for manual inspection. The author discusses various types of scanners, including gamma-ray, X-ray, and neutron systems, and highlights advancements in artificial intelligence (AI) and machine learning (ML) that are being used to automate image analysis and threat detection. The podcast concludes by exploring the role of radiation portal monitoring in detecting nuclear and radiological materials.