Chapter Opener Photo Credit
Chapter 1: M. Penn.
Chapter 2: Wikipedia: http://commons.wikimedia.org/wiki/File:Widnes_Smoke.jpg.
Chapter 3: Copyright © oversnap/iStockphoto.
Chapter 4: M. Penn.
Chapter 5: M. Penn.
Chapter 6: Federal Emergency Management Agency/M. Rieger.
Chapter 7: U.S. Army Corps of Engineers/Digital Visual Library.
Chapter 8: Copyright © Alan Crawford/iStockphoto.
Chapter 9: Courtesy of Ayres Associates.
Chapter 10: Copyright © OSTILL/iStockphoto.
Chapter 11: Courtesy of the Massachusetts Department of Transportation.
Chapter 12: P. Parker.
Chapter 13: M. Penn.
Chapter 14: Prill Mediendesign & Fotografie/iStockphoto.
Chapter 15: M. Penn.
Chapter 16: Prill Mediendesign & Fotografie/iStockphoto.
Chapter 17: Courtesy of S. Owusu-Ababio.
Chapter 18: Courtesy of R. Webster.
Chapter 19: Courtesy of Caltrans, District 4 Photography/J. Huseby.
Chapter 20: M. Penn.
Chapter 21: Andy McNeill.
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