Keywords: From science security.jpg en Graphic image collage used on front of presentation images prepared for use by an official of the U S Department of Homeland Security http //gsi nist gov/global/docs/sit/2010/NIST/Coursey pdf U S Department of Homeland Security -- Standards for Homeland Security author 2010-09 PD-USGov-DHS unknown Science and Technology Directorate Mottos PD-USGov |