In this studio scene the hosts discuss sex education in schools -- the controversial topic raises questions about parental rights and religious beliefs.

In this scene, Daphne Melissa McClendon, a health and physical education teacher, talks about teaching high school sex education in an area gripped by teenage pregnancy.

Doctors Larry Mass and Anthony S. Fauci explain that just like in the past, HIV is striking communities that are overlooked -- this time communities of color in the South.

Immigration controversies echo past anti-immigration backlash. Why a lawsuit over scalding coffee is misunderstood. The origin of Special Ops forces.  Risks after Challenger. Andy Borowitz examines Anita Bryant’s unintended influence.

Sex ed programs in schools are informed by the past; busting a crime myth; AIDS hot spots; the legacy of napster; Andy Borowitz tackles bullying.

Judy Allen recalls the severe burns her mother, Stella Liebeck, received when a cup of McDonald's coffee spilled in her lap.

Diane Vaughan, author of "The Challenger Launch Decision," discusses the danger of falling back on routine under uncertain circumstances.

Hosts Celeste Headlee and Masud Olufani introduce the theory of normalization of deviance, an understanding that came from study of the Challenger disaster.

In this clip from Episode 6, host Masud Olufani says that Congress recently approved funding for a program to help poor families move to new neighborhoods. That’s because of new research showing that moving to a new address - sometimes just a mile or two away - can alter the course of a child’s life.

Public housing influenced by a 1970s experiment. Newborn tests are a legacy of a boy who spent life in a bubble. Head injuries in pro sports. Too few people (not too many) is a problem.  Andy Borowitz takes on Space Force.

In this scene from episode 6, Valencia Morris describes what happened when her family became eligible to move from public housing to a new neighborhood. "I couldn’t believe how beautiful it was, how quiet it was."

Texting could reduce suicides. Surrogate parenthood. Lead is banned but a toxic mess remains. Climate help may come from the Cold War. Long prison sentences based on old fears are being shortened. Andy Borowitz on a river that burst into flames.

In this clip from Episode 5, the hosts discuss a simple intervention against suicide – messages of compassion and empathy – that showed promise in the 1960s, but has been overlooked.

In this scene from Episode 5" June Tourangeau, a licensed practical nurse in Providence, R.I., discusses her work with lead-poisoned children.

By the mid 2000s, a suicide crisis was emerging among American servicemembers and veterans. David Luxton, a U.S. Air Force veteran and clinical psychologist, was hired by the department of defense to help find a solution.

President Trump is taking on the press with a time-tested strategy. Explore the origins of the latest measles outbreak, pro sports free agency, and the consequences of a law meant to save wild horses. Andy Borowitz on the no-apology apology.

The wild horses running free in the west today -- and the controversy over what to do with them -- are the result of law that was meant to rescue them.

Why crime witnesses fail to act. A Naval officer who transformed the U.S. military. Psychedelic drugs like LSD are back in the lab. The meandering voyage of a trash barge that persuaded us to recycle. Andy Borowitz highlights lunar hoax theorists.

In this scene from "Digital Bystander," how the press reported the Genovese story wrongly created a catalyst for the creation of the 911 system, and new calls for bystander assistance laws in the new era of publicly viewed violent videos.

The death of Kitty Genovese, who was murdered on her way from work in Queens, New York in 1964, while people in nearby apartments were sleeping, became a case study in what became known as the Bystander Effect.