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A green light shines through the morning frost decorating the windshield of the press bus for U.S. Presidential hopeful Sen. John Edwards (D-NC), as staff members and media embark on their 36-hour-long campaign visit lasting January 1-January 2 across Iowa with the Edwards family in the lead-up to the January 3 caucus. (Photo by: Yana Paskova for The New York Times)..