CREDITS:

Writer: Mat Heyman

Editor: Madeleine Jacobs

Designer: William Welsh
Production Coordination:
Nancy Starnes

Editorial Assistants:
Virginia Covahey
Suzanne Jones

Photography: Mark Helfer, all photos except as noted below.

Charles Savadelis, pg. 20, 37, 52, 62 (lower photo), 66, 74, 76, 77; Darwin Miner, pg. 15, 17, 58 (upper photo); Geoffrey Wheeler Photography, pg. 10, 11, 12; Lawrence Knab, p. 23; Edgar Etz, p. 24; David Lashmore, P. 42; Masao Kuriyama, p. 46 (right); David Ballard, p. 58 (lower photo); Department of Housing and Urban Development, p. 22; National Transportation Safety Board, p. 40;

American Iron & Steel Institute, p. 41; U.S. Environmental Protection Agency, p. 57;

National Oceanic & Atmospheric

Administration, p. 72; National Fire
Protection Association,
back cover (left).