Floyd Cooper and Jerry Pinkney's works are on display in the Freed Galleria, and the exhibit includes images from Cooper's "Juneteenth for Mazie" and Pinkney's "Ain't Nobody a Stranger to Me." Juneteenth marks the day when federal troops arrived in Galveston, Texas, in 1865, to make sure that all enslaved people are freed. The Mazza Museum is holding a special event this Friday to mark the longest-running African-American holiday.