Commander Rigdon was in charge of arranging many of the details surrounding Truman 's vacations , some official State visits , and some visits to the U.S. by foreign Heads of State . The Rigdon papers are diverse in content . The collection includes documents about the Potsdam Conference in July and August 1945 , and Truman 's return to the United States on the when the first atomic bomb was dropped in Japan on August 6 , 1945 . President Truman made many recreational voyages aboard the Presidential yacht , the . The collection includes an array of price lists and menus for food served on Truman 's voyages as well as handwritten mileage charts . Many of Truman 's Whistlestop Campaign speeches from 1948 are in the collection , along with speeches supporting the Democratic Party during the 1952 election . Also included are handwritten notes , formal correspondence , meeting minutes , press releases , newspaper clippings , magazine articles , and maps . Photos are also included in the collection , but are cross referenced to the audiovisual collection
Potsdam Conference
Potsdam Conference
William M. Rigdon