David McMahon works as a researcher at Sandia National Laboratory, a Department of Energy facility. His research involves work on nuclear fusion and the design of nuclear-powered spacecraft. He has a master's degree in physics and a bachelor's in applied mathematics, both from the University of New Mexico at Albuquerque. He is currently pursuing a doctorate in theoretical physics in the areas of quantum field theory and the use of general relativity. Mr. McMahon is a published author. Previous work includes two books on computer programming: "Rapid Application Development with Visual Basic 6"