Visitors view artworks during a preview of the exhibition "Gordon Parks: The New Tide, Early Work 1940-1950" at the National Gallery of Art in Washington D.C., the United States, on Oct. 30, 2018. The exhibition, bringing together 150 photographs and ephemera, focuses on the formative decade of the American photographer's 60-year career. It will be opened to the public from Nov. 4, 2018 to Feb. 18, 2019. (Xinhua/Liu Jie)