In its latest Technical Resources Assistance Center & Information Exchange newsletter, the Department of Health and Human Services’ Assistant Secretary for Preparedness and Response shares lessons learned related to pre-hospital care, trauma and emergency response from mass shootings at a large outdoor concert, nightclub and place of worship. For additional emergency readiness resources, visit https://asprtracie.hhs.gov/tracie-resources and https://www.aha.org/websites/2006-05-12-emergency-readiness.