““While no known record exists of the first entreaty to the Greenbrier, resort historian Robert Conte believes it came during the property’s 1956 North American summit, which brought Eisenhower together with the leaders of Canada and Mexico. While historic details are sketchy, Eisenhower appears to have met privately with railway president Walter Tuohy during the three-day summit to discuss the bunker. Then, the day after Eisenhower departed, the congressional leadership wrote him an opaque letter on March 28, 1956: “This is to introduce Mr. J. George Stewart, Architect of the Capitol, who is calling upon you on matters of vital importance to the Congress of the United States.””