Senator Frank E. Moss and U.S. Forest Service Assistant Chief Edward P. Cliff, with Smokey Bear, by Unknown, July 20, 1961, Smithsonian Archives - History Div, Senator Frank E. Moss of Utah and U.S. Forest Service Assistant Chief Edward P. Cliff, with Smokey Bear in his enclosure at the National Zoological Park. Moss and Cliff hold a poster that reads "Smokey Says - Only you can PREVENT FOREST FIRES!".