Oil and gas regulators are investigating manipulated environmental tests. - Colorado's leading Democrats criticize President Biden's pardon of his son. - The instrument gathering dust in a closet could unlock the world of music for a kid in Colorado. Episode Credits

Produced by Kyle Clark, Mallory Harris and Marilyn Moore

Reporting by Marshall Zellinger, Marc Sallinger, Angeline McCall,

Spencer Soicher and Evan Kruegel 

Editing and mixing by Geoff Sawtell

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