This document summarizes a study examining the relationship between post-traumatic stress disorder (PTSD) and suicide among US service members and veterans of the Iraq and Afghanistan wars. It notes that 11-20% of military members from those wars have been diagnosed with PTSD, and about 22 service members die by suicide per day, surpassing combat deaths. The study reviews past research on PTSD and interviews veterans diagnosed with PTSD. It aims to provide insight into factors contributing to the link between PTSD and suicide.