Dr. Lee E. Gray is Professor of Architectural History in the School of Architecture and Senior Associate Dean in the College of Arts + Architecture. He received his Ph.D. in architectural history from Cornell University, his Masters in architectural history from the University of Virginia, and undergraduate architecture degrees in architecture from Iowa State University. He is the author of From Ascending Rooms to Express Elevators: A History of the Passenger Elevator in the 19th Century. Since 2003 he has written monthly articles on the history of vertical transportation for Elevator World magazine. Dr. Gray is an internationally recognized scholar and expert on the history of vertical transportation. Current projects include a book on the history of escalators and moving sidewalks. He has appeared on the History Channel in "Modern Marvels – Building a Skyscraper" (2004), the National Geographic Channel in "Big, Bigger, Biggest – Airport" (2008) and on PBS in "NOVA: Trapped in an Elevator" (2010).