Truman and Acheson at Acheson's Swearing-in Ceremony
President Harry S. Truman (right) shaking hands with Secretary of State Dean Acheson (left) during Acheson's swearing-in ceremony in the Oval Office. Standing in the background are, from left to right: Major General Harry Vaughan, Captain Robert Dennison, Chief Justice Fred Vinson (partly obscured by Truman), Mary Jane Truman, and three unidentified women.