You can now access the Homeland Security Digital Library via http://micro189.lib3.hawaii.edu/ezproxy/details.php?dbId=53472. From the HSDL site:
The Homeland Security Digital Library is composed of homeland security related documents collected from a wide variety of sources. These include federal, state, tribal, and local government agencies, professional organizations, think tanks, academic institutions, and international governing bodies. Resources are carefully selected and evaluated by a team of librarians and subject-matter specialists.