The FBI has concluded its investigation into a fiery car wreck at a border checkpoint in Niagara Falls and ruled out a terror attack, providing relief during the Thanksgiving holiday. The vehicle crashed through an intersection, hit a median, and exploded at the Rainbow Bridge. "A search of the scene revealed no explosive materials, and no terrorism nexus was identified," the FBI's Buffalo office said in a statement. "The Niagara Falls Police Department is now handling the case as a traffic investigation.