The document discusses traumatic brain injury (TBI) in veterans. It describes the daily struggles that veterans with TBI face, such as memory loss and mood swings, and how it affects their families. Advanced scanning technologies like CAT scans and MRIs are helping doctors better understand and diagnose TBI. However, there is no clear way to prevent TBI during combat, as the hidden explosive blasts are difficult to detect and protective equipment does not block the sonic impacts. The long-term effects of TBI are a serious issue affecting many veterans.