The last radio transmissions of the Sikorsky S-76B Helicopter (N72EX) while performing a flight from Santa Ana KSNA.Notes:IFR = "Instrument Flight Rules" are in effect.VFR = "Visual Flight Rules" are in effect.The Helo is moving green symbol (easier to see on big screen).They were "Held" in a hold pattern for 15 minutes due to traffic in/out of local airports.I worked radar for 20 years (US Navy). This is sad, all around.A local News report included:"LA times reported LAPD grounded their helicopters until the afternoon due to fog."A couple local residents said, "The fog here has been quite ugly," and, "There has been some WICKED fog in LA the past 3 days and nights. Some of the worst I've ever seen. I'm sure conditions were extremely difficult."