Today is Juneteenth, a holiday to commemorate the day in 1865 when liberation of the last African-American slaves was announced in the city of Galveston, Texas. The 155-year-old celebration, also known as Jubilee Day, is considered the longest running African-American holiday. Galveston, which is now home to about 50,000 residents, is shown here next to the waters of the Gulf of Mexico.