Parents tell their daughter's tale of survival

Tylinn Tilley and Tiffany Stoker were in frigid water for roughly three hours after the boat they were in on Bear Lake tipped over. They tried to swim to shore, but the water was far too cold and they were far too exhausted.
But, they pushed each other to survive. Lance and Melanie Tilley say, if the girls didn't have each other, they would have died.