Book excerpt: The day of the Ice Bowl game was so cold, the referees' whistles wouldn't work; so cold, the reporters' coffee froze in the press booth; so cold, fans built small fires in the concrete and metal stands; so cold, TV cables froze and photographers didn't dare touch the metal of their equipment; so cold, the game was as much about survival as it was about skill and strategy. On New Year's Eve, 1967, the Dallas Cowboys and the Green Bay Packers met for a classic NFL championship game, played on a frozen field in sub-zero weather. The "Ice Bowl" challenged every skill of these two great teams. Here's the whole story, based on dozens of interviews with people who were there—on the field and off—told by author Ed Gruver with passion, suspense, wit, and accuracy.