WTOP Entertainment Reporter Jason Fraley chats with Cheap Trick’s founding bass player Tom Petersson as the band opens for Rod Stewart tonight at Merriweather Post Pavilion in Columbia, Maryland. They spoke in 2015 when the band played The Fillmore in Silver Spring, breaking down their biggest hits from “Surrender” to “I Want You To Want Me,” as well as Petersson’s recent charitable work in music therapy. (Theme Music: Scott Buckley’s “Clarion”)