Many links, lots of information.  Post 9/11, PTSD became a part of a larger culture as people were traumatized watching the suffering of others.  A pivotal time that literally changed the views of everyone.  It rocked the world and opened discussion of how to treat those that suffer from witnessing traumatic events.  I haven’t explored every link or read every word but it looks promising to providing a lot of information to sift through.  I downloaded the PDF file on psychological first-aid.

http://www.ptsd.va.gov/public/types/disasters/survivors_disaster.asp