Was tuning the AM dial last night around 1 AM EST and found WHAS OFF the air. This morning, around 5, I noticed they were back on the air with IBOC! I guess I won't be listening to KOA-850 anymore as long as this interference lasts. I thought WHAS "saw the light" when they killed this intentional interference a year or more ago.... IMHO, HD has no business in the AM band where it is totally incompatible with traditional analog broadcasters.