This week on "Sunday Morning" (December 31)

Students speak out about controversial AP African American Studies course: "History that everybody should know"Louisiana principal apologizes, requests leave after punishing student for dancing at party; her mom says "too little, too late"

Video of traffic stop that led to Atlanta deacon's death will be released, attorney saysThousands got Exactech knee or hip replacements. Then, patients say, the parts began to fail.California's new tool aims to help track down missing Black youth

Coast Guard recovers "presumed human remains" and debris from Titan sub implosionCruises detouring away from war-torn Israel

Olympics legend Mary Lou Retton "fighting for her life" in ICU due to pneumonia, daughter says

Incomes are falling in 17 states. Here's where Americans are falling furthest behind.Supermassive Black Holes Can Force a Shredded Star to Collide With Its Own Death Spiral

Rosetta Photographed Some Weird Changes on Comet 67P Before It Crash-LandedStephen Hawking Just Announced He's Going to Space

James Hong: An actor's guide to longevityWe'll Probably Have to Genetically Augment Our Bodies to Survive Mars