Dozens hurt as US bridge collapses
	A pedestrian walkway has collapsed at a motor racing event in the US state of North Carolina. The incident happened following the NASCAR race at Lowe's Motor Speedway in the town of Concord. The BBC's Catherine Marston reports.

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	Hospital spokeswoman Caroline Moore: "Fifteen are critically injured"
	Stephen Lipscomb, Cabarrus County Emergency Management: "They're separated through four different hospitals in the area."
	Scores hurt as US bridge collapses