Kidde recalling 250K smoke, carbon monoxide detectors after finding out they don't work

The company Kidde is recalling a quarter of a million smoke detectors and combination smoke-and-carbon monoxide detectors. The company says this is because they won't actually go off if there's a fire. The "Tru Sense" alarms were sold at Walmart, Home Depot and on Amazon between May 2019 and last...