The DoD has identified the 20 most critical technologies that will be key to improving America's defense capabilities into the 21st century. Led by Senior Dean and Scientific Advisor J.S. Przemieniecki, the Air Force Institute of Technology's team of experts put together this important book for everyone involved in defense research and development. Each of the 20 critical technologies is examined in-depth, including physical and engineering principles. A full description of the technology in its current state of the art and its projected impact on future weapon systems is provided.