Copyright

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[Page iv]

Library of Congress Cataloging-in-Publication Data

On file

Vice President and Editorial Director, ECS: Marcia J. Horton

Executive Editor: Tracy Dunkelberger

Assistant Editor: Carole Snyder

Editorial Assistant: Christianna Lee

Executive Managing Editor: Vince O'Brien

Managing Editor: Camille Trentacoste

Production Editor: Donna Crilly

Director of Creative Services: Paul Belfanti

Art Director and Cover Manager: Jayne Conte

Cover Designer: Bruce Kenselaar

Managing Editor, AV Management and Production: Patricia Burns

Art Editor: Gregory Dulles

Manager, Cover Visual Research and Permissions: Karen Sanatar

Manufacturing Manager, ESM: Alexis Heydt-Long

Manufacturing Buyer: Lisa McDowell

Executive Marketing Manager: Robin O'Brien

Marketing Assistant: Barrie Reinhold

Cover Image: Natalie Racioppa / Photodisc Red / Getty Images.com

© 2006 Pearson Education, Inc.

Pearson Prentice Hall

Pearson Education, Inc.

Upper Saddle River, NJ 07458

All rights reserved. No part of this book may be reproduced in any form or by any means, without permission in writing from the publisher.

Pearson Prentice Hall^® is a trademark of Pearson Education, Inc.

The author and publisher of this book have used their best efforts in preparing this book. These efforts include the development, research, and testing of the theories and programs to determine their effectiveness. The author and publisher make no warranty of any kind, expressed or implied, with regard to these programs or the documentation contained in this book. The author and publisher shall not be liable in any event for incidental or consequential damages in connection with, or arising out of, the furnishing, performance, or use of these programs.

Printed in the United States of America.

10 9 8 7 6 5 4 3 2 1

 Pearson Education Ltd., London Pearson Education Australia Pty. Ltd., Sydney Pearson Education Singapore, Pte. Ltd. Pearson Education North Asia Ltd., Hong Kong Pearson Education Canada, Inc., Toronto Pearson Educación de Mexico, S.A. de C.V. Pearson EducationJapan, Tokyo Pearson Education Malaysia, Pte. Ltd. Pearson Education, Inc., Upper Saddle River, New Jersey 

[Page v]

Dedication

To all those who work to leave our world a little better than they found it.