U.S. Steel on Friday pinned blame for the deadly explosion Monday at the Clairton Coke Works on a valve failure that led to coke oven gas igniting, according to the company’s preliminary findings.

Diet Coke lovers, listen here. The beloved zero-calorie cola brand is taking one of its discontinued flavors off the bench. Diet Coke Lime — now called Retro Diet Coke Lime — is making a comeback, but ...