For thousands of moms with opioid addiction, this is their struggle: keeping their disease under control during and after pregnancy, in order to keep their kids.

On today's encore edition of The 21st: We revisited our conversation with a former white supremacist-turned-peace activist. Plus, we discussed pet tips for expecting parents and listened to an in-studio performance from the Jupiter String Quartet.

On the 21st: We spoke with “March for Science” organizers from Champaign and Peoria, as well as Ph.D. physicist Bill Foster of Illinois’s 11th congressional district. Plus, we got expert advice on how expectant parents can prepare a pet for the baby’s arrival. And, Chicago-based cellist Tomeka Reid joined us to discuss her music ahead of her show tonight at the Symphony Center.