Map of Cocaine Trafficking by Cities (IMAGE) Michigan State University Caption As part of his research, Siddharth Chandra determined if cities were source, destination, transit or isolate, and then created a map. Credit Michigan State University 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.