Rescuers race against time to find 4 missing hikers in South Carolina. A grandmother and her three grandchildren vanished while hiking in Caesars Head State Park, sparking a massive search effort with drones, helicopters, and K-9 units. The youngest, just 9 years old, called 911 after being lost for three hours. The clock is ticking as authorities scour the rugged terrain for any sign of the missing family.

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