Recently, homeland security has rested on four key activities -- prevention, protection, response, and recovery -- oriented principally against the threat of terrorism. As much as homeland security is about the U.S., a robust notion of homeland security must take account of our essential need to safely, securely, and intensively engage the rest of the world. Thus, homeland security describes the intersection of evolving threats and hazards with the traditional governmental and civic responsibilities of civil defense, emergency response, law enforcement, customs, border control, public health, and immigration. While tremendous focus has been placed on terrorism, cyber and natural disasters, other interconnected threats and challenges characterize today's world - including illicit trafficking in narcotics, economic and financial instability, and the search for new energy supplies - that have tremendous impact on our notions of homeland security, and the Department that was created to address them. To provide students the tools necessary to conceptualize the challenges facing homeland security in a interconnected world, this course will examine what is commonly referred to as the "homeland security enterprise," defined as the broad scope of contributions from all federal agencies, levels of governments, businesses, and nongovernmental organizations, individuals, families, and communities, as well as international partnerships.