1. Patients exposed to CBT for PTSD plus treatment-as-usual (TAU) will show significantly greater improvements in PTSD symptom severity relative to patients in the other two interventions (IAC+TAU and TAU alone) at both the three-month and six-month follow-ups. The IAC+TAU condition will show no greater reduction in PTSD symptom severity than the TAU condition at both the three-month and six-month follow-ups.