Today on Boston Public Radio:

Art Caplan weighs in on the role of vaccine mandates, and the quick spread of vaccine misinformation on social media. Caplan is the Drs. William F. and Virginia Connolly Mitty Professor and founding head of the Division of Medical Ethics at NYU School of Medicine in New York City.

Then, we asked listeners about their experiences with the MBTA following a slew of recent derailments and other accidents.

Juliette Kayyem updates listeners on all things national security, including updates on trials of those involved in the Jan. 6 riots, which have been slowed down due to an abundance of evidence. Kayyem is an analyst for CNN, former assistant secretary at the Department of Homeland Security and faculty chair of the homeland security program at Harvard University’s Kennedy School of Government.

Jamarhl Crawford and Tanisha Sullivan criticize a lagging timeline and lack of transparency regarding efforts for police reform, and discuss the need to put reform at the top of the agenda in the mayoral race. Crawford is an activist, community organizer and Editor of The Blackstonian. Sullivan is an attorney and the President of NAACP Boston Branch. They are both members of the Boston Police Reform Task Force.

Brian McGrory talks about the impact of The Boston Globe’s Spotlight team, how the Globe is covering the mayoral race and Tom Brady’s upcoming return to Gillette Stadium Sunday. McGrory is the editor-in-chief of the Boston Globe.

Jared Bowen previews latest art exhibits, including the Titian exhibit at the Isabella Stewart Gardner Museum, the Frida Kahlo exhibit at Brandeis’ Rose Art Museum and Mariano Rodríguez’s exhibit at Boston College’s McMullen Museum of Modern Art. Bowen is GBH’s Executive Arts Editor and host of the TV series Open Studio.

Then, we ask listeners what they love (or hate) about coffee in honor of today’s National Coffee Day.