Heat Map (IMAGE) University of California - Davis Health Caption This is a heat map of excess firearm purchases in California following 2012 presidential election. Credit UC Davis Violence Prevention Research Program Usage Restrictions With attribution to UC Davis Violence Prevention Research Program License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.