For this assignment you will write a research paper that reports on a terrorist event that has happened in U.S. history. Refer to the annotated bibliography that you submitted in Unit III, and review your instructor’s feedback. Review the research that you already conducted on your specific event, and address the issues listed below in your paper. Summarize what happened in the terrorist event. Describe the environmental, political, economic, and sociological impact of the event and the response at all levels of government. Identify the type of response partners and agencies involved with the response and recovery of the event as well as after actions and lessons learned from the event. Provide information about the critical infrastructure that was impacted and how the role of protecting this infrastructure was forever changed due to this event. Discuss the national strategies for the U.S. Department of Homeland Security as it relates to this event. Support your research paper with a minimum of two sources from the Library. Your research paper should be a minimum of three pages in length, not counting the title or references pages. This assignment should be formatted according to APA standards.