 - Subjects with a recent 2 month history of psychiatric hospitalization or suicide attempt. Recent work with veterans with severe mental illness suggests that a 2-month period of stabilization is sufficient to minimize risk and possible relapse Frueh, 2005. Subjects with an existing diagnosis of schizophrenia or other Axis I serious mental illnesses SMI, besides PTSD will be excluded. SMI will include any severe and persistent mental illness. 