This is the terrifying moment a young girl clings to a window sill as she perches on a tower block ledge above a dizzying 150ft (45m) drop. https://filedn.eu/lhVNGNsizwl5t7THnzzJ2c8/New%20public/CEN-GirlHangs-01.mp4 Nail-biting phone footage of the drama shows the nine-year-old girl screaming for help as she holds on by her fingertips outside the…