Gunshots in Washington D.C., 2010-2012 (IMAGE) University of Pennsylvania Caption Gunshots in Washington, D.C., during the three-year period from 2010 to 2012. Each circle represents a different gun-related event. Credit Charles Loeffler/University of Pennsylvania Usage Restrictions None 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.