The HSDL is sponsored by the U.S. Department of Homeland Security's National Preparedness Directorate, FEMA and the Naval Postgraduate School Center for Homeland Defense and Security. documents related to homeland security policy, strategy, and organizational management from a wide variety of sources including federal, state and local governments; international governments and institutions; nonprofit organizations and private entities. Most Homeland Security Digital Library (HSDL) resources are not openly available to the public at large. Full access to the HSDL Collection and the News Digest Collection is available to homeland security officials and academics for research, analysis, and policy and strategy development.