Deadly heroin overdoses are on the rise in Colorado. As far back as the 1980s, dealers from a small town in Mexico saw Denver as a land of opportunity. Also, amid a shortage of construction workers there's a rush to train recruits. Plus, Denver’s Biennial of the Americas returns this week with some big events during the five-day festival but with a significant cut to smaller arts events held in past years. Then, a witness to 9/11 and her musical portrait of the tragedy.