addition to his military success, Marshall is primarily remembered as the driving force behind the Marshall Plan, which provided billions of dollars in aid to post war Europe to restart the economies of the destroyed countries. In recent years, the cooperation required between former European adversaries as part of the Marshall Plan has been recognized as one of the earliest factors that led to European integration beginning with the formation of the European Coal and Steel Community, and eventually the formation of the European Union. In a television interview after leaving office, Truman was asked which American he thought had made the greatest contribution of the preceding thirty years. Without hesitation, Truman picked Marshall, adding "I don't think in this age in which I have lived, that there has been a man who has been a greater administrator; a man with a knowledge of military affairs equal to General Marshall." Orson Welles said in a 1970 interview with Dick Cavett that "Marshall is the greatest man I ever met... I think he was the greatest human being who was also a great man... He was a tremendous gentleman, an old fashioned institution which isn't with us anymore." The story Welles related to Cavett to illustrate his point was about a time he saw Marshall take the time to speak with a young, overawed American soldier who had accidentally entered the same room. Tributes and memorials Two non-profit organizations, the George C. Marshall Foundation and the George C. Marshall International Center, actively propagate General Marshall's legacy. The Marshall Foundation oversees Marshall's official papers and over two million other documents relating to the 20th century. The International Center preserves Marshall's home, Dodona Manor, as a museum and hosts educational programs focusing on Marshall's life, leadership, and role in American history. Numerous streets are named for General Marshall, including George-Marshall-Straße in Wiesbaden, Germany and George-C.-Marshall-Ring in Oberursel, Germany. On April 30, 1998, the George C. Marshall European Center for Security Studies unveiled the first public statue of General Marshall in Europe in Garmisch-Partenkirchen, Germany. The slightly larger-than-life statue was sponsored by the Marshall Center, the Friends of the Marshall Center and the City of Garmisch-Partenkirchen. It shows Marshall in uniform walking across a bronze bridge, facing east, to greet new friends and allies and was designed by artist Christiane Horn of Wartenberg, Bavaria. Vernon A. Walters, former U.S. ambassador to Germany, was a