Hampton Sides acknowledges it:

There are an estimated 24 million cases of PTSD in the United States alone, the majority of the patients likely being veterans. Over the past decade, however, PTSD has gradually become associated with civilian professionals as well: firefighters, police officers, emergency techs, and other first responders whose jobs routinely put them in harm's way and expose them to horrific scenes. A study published in The American Journal of Psychiatry in 2007 reported that 22 percent of volunteer emergency workers at the World Trade Center disaster site developed a wide range of PTSD symptoms. Traumas suffered by victims and relief workers in recent natural catastrophes such as the 2004 Indian Ocean tsunami and last year's earthquake in Haiti have further confirmed that PTSD extends far beyond combat scenarios.