Since formed in 2002, DHS has been at the forefront of determining and furthering some of the most hotly debated security issues facing the U.S. and global community in the 21st century. Nearly 200 university programs with undergrad and graduate majors have cropped up in the last dozen-plus years with limited resources available to teach from. Homeland Security, Third Edition will continue to serve as the core textbook covering the fundamental history, formation, oversight, and reach of DHS currently. The book is fully updated with new laws, regulations and strategies across intelligence, transportation sectors, emergency management, border security, public utilities and public health.