With the coming of World War II, Ford was appointed to the Office of Strategic Services as a field photographer in the United States Navy. During the war he made several documentaries. Two of these, "The Battle of Midway" and "", won Academy Awards for, respectively, Best Documentary and Documentary Short Subject. After being released from active duty he returned to Hollywood to make "They Were Expendable" (1945) a war drama of PT boats in the South Pacific. He followed this with "My Darling Clementine" (1946), starring Henry Fonda as Wyatt Earp. In 1947, Ford reunited with Merian Cooper and began making films for their own company, Argosy Productions. Over the next nine years they made "Fort Apache", "3 Godfathers", "She Wore a Yellow Ribbon", "Rio Grande", "The Quiet Man", and "The Searchers". For "The Quiet Man", Ford won his fourth Academy Award for Best Director. In 1949, Ford also made his only foray into live theatre by directing a charity production of "What Price Glory?" After dissolving Argosy, Ford freelanced for the remainder of his career, directing occasionally for television and making several films including "The Man Who Shot Liberty Valance" and the Civil War sequence of the Cinerama epic "How the West Was Won" (both 1962). Ford's final film as a director was "" (1970), a documentary short about Marine Corps lieutenant general Lewis "Chesty" Puller. Ford is widely regarded as one of the most important and influential film-makers of his generation. Ingmar Bergman called him the greatest movie director of all time and Orson Welles regarded him highly. With four Academy Awards, he is the most honored director in film history. On February 8, 1960, Ford was awarded a star on the Hollywood Walk of Fame. On March 31, 1973, Ford was honored with the Medal of Freedom Award and became the first person honored with the AFI Life Achievement Award. As of , eleven films directed or co-directed by Ford have been added to the National Film Registry, tying with Howard Hawks for the most: "The Iron Horse", "The Informer", "Stagecoach", "Young Mr. Lincoln", "The Grapes of Wrath", "How Green Was My Valley", "My Darling Clementine", "The Quiet Man", "The Searchers", "The Man Who Shot Liberty Valance", and "How the West Was Won". In 2012, "The Searchers" was ranked at number seven in "Sight & Sound"'s listing of the 50 greatest films of all time.