This past Friday, communities across the United States celebrated Juneteenth, when, in 1865, Union troops announced to the last slaves in Texas that they were free. Juneteenth has been commemorated by African American communities for 155 years...so why has it become so important right now? In this week's episode of Who Knew?, Mrs. Allgood and Mr. Rixon explore the origins of Juneteenth, how African Americans have celebrated the holiday throughout history, and how societies choose to honor, as well as ignore, parts of their past.