Diver, 80, survives 18 hours in Atlantic

By the time spear fisherman Ignacio Siberio realised his boat had drifted away in the chilly waters off the Florida Keys, it was too late to signal for help.

Instead, the 80-year-old who dives nearly every weekend, called on his instincts mustering all his mental and physical strength to move his legs underwater to prevent hypothermia.