Last year 52 children died in hot cars, the highest number in 20 years. Now major car makers say they will add rear seat reminder alarms in all cars and trucks in the next 5 years. There's already a backseat hot car app alarm, but after last year’s more than 50 hot car child death record, virtually all major auto makers say they will install a reminder alarm in virtually every car and truck by 2025. Some systems will call police and give them a GPS location, if you don't return and rescue your child. ABC's Cheri Preston joins Tony with the details.