Police launched a daring rescue to save a man clinging onto a cliff face after he fell more than 50 feet. A dramatic video shows the intense rescue by the Sonoma County Sheriffs helicopter. Thermal imaging footage shows the man clinging onto the cliff face in desperation as a rescuer is heard telling the man to “not let go” before placing him into a rescue device. Police were alerted to the incident in the area of the Alexander Battery in the Golden Gate National Recreation Area in California, on March 31 at around 7:40 p.m. The victim was then flown to the top of the cliff and delivered to fi…