Did radiation released after the nuclear accident at Three Mile Island result in mutated thyroid cancers in Central Pennsylvania? Studies in the ensuing 38 years since the incident all concluded there were no negative health effects from the small amount of radiation released.

That was until last week when news that a research team at the Penn State College of Medicine found a "shift in cases to cancer mutations consistent with radiation exposure."

Dr. David Goldenberg is a professor of surgery at Penn State Hershey Medical Center and the lead researcher on the thyroid study.

He joins us on Tuesday's Smart Talk to discuss his research and some of the long-term consequences of the TMI meltdown.

Throughout the South, states grapple with what to do with Confederate monuments in public spaces. Under cover of night, New Orleans Mayor Mitch Landrieu had four prominent monuments removed from city spaces amid death threats leveled against public workers, saying the monuments "represent an institutional indifference that has existed for a long time that actually strangles people's lives."

While monuments to the Confederacy are commonplace throughout the South, the only ones to be found in Pennsylvania are at the Gettysburg National Military Park. Fourteen stone monuments and sculptures commemorate the soldiers of the Confederate Army as Americans, not enemies.

Smart Talk focuses on the removal of Confederate monuments.

Joining us for the discussion are Barbara Barksdale, a local historian and founder of Friends of Midland Cemetery, Chris Gwinn, Supervisory Historian for Interpretation and Education at the Gettysburg National Military Park, Daryl Black, PhD., Executive Director Seminary Ridge Museum in Gettysburg and Alfred Brophy, PhD., Judge John J. Parker Distinguished Professor of Law at the University of North Carolina-Chapel Hill.