The military has been seeking the causes of a spike in military suicides for the last several years so it can begin knocking it down. New evidence just coming to light makes clear that the frequency of military deployments may play a role. John Nagl, of the Center for a New American Security, and I discuss this persistent challenge with Dr. Margaret Harrell, a CNAS military personnel expert who just co-wrote a study on the topic, and Dr. Elspeth “Cam” Ritchie, a Battleland contributor who recently retired as the Army’s top psychiatrist.