John Prussing is Professor Emeritus of Aerospace Engineering at the University of Illnois at Urbana-Champaign. He holds a SB, SM and a ScD in 1967 in aerospace engineering all from MIT, and served as professor of aerospace engineering between 1969 and 2007, and continues to teach part time, including short courses at NASA. He has published over 80 articles and has authored/co-authored three books.