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This study was supported by Contract No. N00014-05-G-0288, DO #31 between the National Academy of Sciences and the Department of the Navy. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the organizations or agencies that provided support for the project.
Cover: Inset photographs courtesy of LCpl Khoa Pelczar, USMC (top); Cpl Benjamin Crilly, USMC (middle); and Cpl Adam C. Schnell, USMC (bottom). Background image courtesy of Cpl Michael A. Bianco, USMC.
International Standard Book Number-13: 978-0-309-21605-0
International Standard Book Number-10: 0-309-21605-2
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