A tour bus returning from Niagara Falls to New York City overturned on Interstate 90 near Pembroke in upstate New York, killing five people and leaving dozens more injured. It was one of the deadliest road incidents in the region in recent years and has prompted a major state and federal investigation.
Police have already ruled out both mechanical failure and driver impairment. Attention is now turning to whether distraction or human error may have played a role in the tragedy.
