Tom Petty and the Heartbreakers

Acquittal of four police officers in Rodney King trial sparked widespread unrest, and a new Heartbreakers song.

The pair hadn’t toured together for 30 years until Dirty Knobs guest stint began in late April.

"Stop Draggin' My Heart Around" wasn't their only collaboration.

He once described this 20-date 1997 residency as "the best time we've ever had."

One of the Heartbreakers' most enduring songs began on acoustic guitar.

A look at some lesser-played tracks.