Chapter 15: Library of Congress.

Chapter 16: Library of Congress.

Part 6: Library of Congress.

Chapter 17: Library of Congress.

Chapter 18: Chicago History Museum.

Chapter 19: Collection of Mr. and Mrs. Paul Mellon, National Gallery of Art, Washington, D.C.

Chapter 20: Library of Congress.

Part 7: Library of Congress.

Chapter 21: Library of Congress.

Chapter 22: Picture Research Consultants & Archives.

Chapter 23: Picture Research Consultants & Archives.

Chapter 24: Jeff Ethell Color Archives.

Part 8: National Archives.

Chapter 25: © Bettmann/Corbis.

Chapter 26: Photo by Justin Locke/National Geographic/Getty Images.

Chapter 27: Bob Adelman/Magnum Photos, Inc.

Chapter 28: Private Collection/Peter Newark American Pictures/The Bridgeman Art Library.

Chapter 29: Photo by Kit Miniciler/The Denver Post via Getty Images.

Part 9: Luc Delahaye/Sipa Press.

Chapter 30: Ronald Reagan Presidential Library.

Chapter 31: Raphael AILLARDE/Gamma-Rapho via Getty Images.