Juneteenth is the oldest known US celebration of the end of slavery. African-Americans and others mark the anniversary much like the <a href=”http://www.cnn.com/2013/06/05/us/independence-day-fast-facts/index.html” target=”_blank”>Fourth of July,</a> with parties, picnics and gatherings with family and friends. Here’s a look at Juneteenth, also called Emancipation Day, Freedom Day and Jubilee Day, by