Festival of American Folklife, 1973, by Neufeld, Harry B, 1973, Smithsonian Archives - History Div, Yugoslav dancers rehearse on the South Terrace of the National Museum of History and Technology, now the National Museum of American History, before their performance at the seventh annual Festival of American Folklife, June 30 - July 8, 1973. Behind the dancers is the sculpture "Infinity." The Washington Monument can be seen in the distance..