This book covers two aspects of the career of D Allan Bromley: the science policy aspect and the scientific aspect.In the first half of the book, contributions from Governor John Sununu, former White House Chief of Staff under President George H W Bush; Neal Lane, former Science Adviser to President William Clinton; John Marburger III, Science Adviser to President George W Bush; and Mary Good, former Undersecretary of Commerce, highlight the role of Bromley as Science Adviser to President George H W Bush and a maker of science policy in the second part of the 20th Century. This part is of interest to science policy scholars, historians, and young persons wishing to start a career in science policy.In the second half of the book, articles by directors of laboratories and leading scientists discuss future programs in all areas of nuclear physics — low-energy, medium-energy and high-energy — to which Bromley greatly contributed, in the USA, Europe and Japan. This part of the book is of interest to all researchers in the field of nuclear physics, as it provides a comprehensive but succinct overview of the field and indicates directions for future research in the first part of the 21st century.