This document was prepared under FAA Contract DTFAWA-15-D-00031 with support from AvMet Applications, Inc.

Individual photographic contributions were made by Blake Spry (front cover), Luke Culver (front cover and cover of Chapter 15), and Larry Burch (covers of Chapters 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 16, 18, 23, 24, 25, 26, 27, 28, Part 1, Part 2, and Part 3). Cover of Chapter 20 courtesy of the National Research Council of Canada.