leadership and meet its expanding mandates. There is a pressing need to groom the interdisciplinary-thinking and collaborative leaders of tomorrow and prepare for the coming retirement of large numbers of senior scientists. As this report underscores, there is an increased recognition of the need for cross-disciplinary training and of the need to expand the capacity in social and information sciences. In addition, EPA will continue to need leadership in traditional core disciplines, such as statistics, chemistry, economics, environmental engineering, ecology, toxicology, epidemiology, exposures science, and risk assessment. EPA’s future success will depend on its ability to address long-standing environmental problems, its ability to recognize and respond to emerging challenges, its ability to link broader problem characterization with solutions, and its capacity to meet the scientific needs of policy-makers and the American public.