Eroding Valve Potentially Caused Husky Refinery Explosion

Investigators say it's similar to one that occurred in Torrance, California at Exxon Mobile's refinery.

SUPERIOR, Wis.- The potential cause behind the Husky Energy refinery explosion in Superior is believed to be found during an ongoing investigation by the U.S. Chemical Safety Board. Investigators tell us it appears the explosion could have happened due to an eroded piece of equipment.  Click here for a play-by-play animated video of before, during and after the explosion. “You…