The S. Department of Defense does not have enough staff or technology to complete cognitive assessments for all high-risk, active-duty service members, according to a new report from the Government Accountability Office (GAO). The report found that only 86% of required assessments were completed last year.

The assessments are part of an effort to monitor the brain health of service members exposed to blasts. They were ordered in the wake of a mass shooting in Lewiston, Maine, in October 2023, carried out by Army Reservist Robert Card. Card killed 18 people in the attack. He had been repeatedly exposed to blasts as a Reservist, and forensic testing found he had a brain injury, raising questions about whether the injury was related to his military service.

The GAO report highlights a gap between the Department of Defense's mandate and its capacity to fulfill it, underscoring challenges in ensuring comprehensive brain-health monitoring for service members in high-risk roles.