David Ahn is a Seoul (Korea) based  photographer. He is an exclusive photographer of iStockphoto.com (www.istockphoto.com/David_Ahn). Originally, he studied electrical engineering, received a doctorate from the University of Illinois and conducted scientific research in New York. During this time, he got into photography seriously as well. Currently, he is doing university teaching as a full-time professor, writing, and select photography assignments.