The Homeland Security Digital Library produced by the US Department of Homeland Security gives quick access to an amazing range of US policy and legislation, presidential directives, and national strategy documents, as well as specialized resources such as theses and reports from universities, organizations, and state and local agencies that have been selected by a team of homeland security researchers.

The easy-to-search database features more than 30 topics including border security, cyber crime and infrastructure, hurricanes, wildfires, earthquakes, energy security, immigration, sea piracy, climate change, and social media use in emergencies. Just to give you an idea of the breadth of content available here, the reports and briefings produced by the Congressional Research Service that are included range from Changes in the Arctic: Background and Issues for Congress [May 31, 2016] to Libya: Transition and U.S. Policy [May 13, 2016]. This is a fascinating resource!