Cabinet officers

President Harry S. Truman flips a fake power switch for the Hungry Horse dam in Kalispell, Montana. President Truman made a public address there while on a campaign trip through the western United States. Also pictured: Secretary of the Interior Oscar Chapman (center). Man on right is unidentified.

Secretary of the Interior Oscar Chapman (foreground) speaks at the dedication of Hungry Horse Dam outside Kalispell, Montana. Pictured, in background: C. H. Spencer, Hungry Horse Dam construction engineer (fourth from right); and Governor John W. Bonner (right). All others unidentified.

Under Secretary of the Interior Vernon Northrop (at podium) speaks during a United Nations Day event in the Department of the Interior auditorium. Also pictured: Assistant Secretary of the Interior Joel D. Wolfsohn (seated, behind Under Secretary Northrop). All others unidentified.

Floyd Dotson (left), Director of Administrative Services, Department of the Interior, swears in Vernon Northrop (right) as Under Secretary of the Interior. Secretary of the Interior Oscar Chapman in center.

Secretary of the Interior Oscar Chapman (center) meets with representatives of labor organizations during a trip to Indiana. Also pictured: Harlan J. Noel, CIO-PAC state director of Indiana. Man in back is unidentified.

Secretary of the Interior Oscar Chapman (center) meets with Lieutenant Governor of Indiana John A. Watkins (left) and Democratic National Committeewoman Inez Scholl during the 1952 campaign.

Joel D. Wolfsohn (center) is sworn in as Assistant Secretary of the Interior. Secretary of the Interior Oscar Chapman is at right. All others unidentified.

Secretary of the Interior Oscar Chapman (seated, second from right) talks with labor leaders during the 1952 campaign. All others are unidentified.

Miss Oklahoma Shirley Barbour (right) presents Secretary of the Interior Oscar Chapman with an invitation to attend the 30th anniversary International Petroleum Exposition in Tulsa, Oklahoma.

An unidentified man is sworn-in as a member of the Bureau of Mines Safety Board. All others unidentified.