"The National Response Framework (NRF) presents the guiding principles that enable all response partners to prepare for and provide a unified national response to disasters and emergencies -- from the smallest incident to the largest catastrophe. As part of the NRF, Emergency Support Functions (ESFs) are primary mechanisms at the operational level used to organize and provide assistance. This series of courses provides an overview of each of the 15 ESFs. This course introduces Emergency Support Function (ESF) #13 --Public Safety and Security Annex."
FEMA Independent Study Program: http://training.fema.gov/EMIWeb/IS/