Nail-biting moment boy, 4, hangs off railing outside 17th-floor apartment as horrified onlookers call for help

THIS is the terrifying moment a little boy stepped outside the guardrails on a 17th-floor balcony leaving horrified onlookers scared for his life. In shocking footage taken by a witness on the ground below, the four-year-old boy clung to the metal bars of the residential window. Dressed in all white, the little boy dangled in...