Cabinet officers

Oscar Chapman being sworn in as Secretary of the Interior. Pictured, left to right: Oscar Chapman; Ann (Mrs. Oscar) Chapman; Supreme Court Chief Justice Fred Vinson.

Secretary of the Interior Oscar Chapman (center) and Ann (Mrs. Oscar) Chapman (left) greet an unidentified member of the Department of the Interior staff.

Oscar Chapman sits for his official portrait as Secretary of the Interior.

Members of President Harry S. Truman's Cabinet and staff at Washington National Airport, waiting for the arrival of President Truman from his Key West vacation. From left to right: unidentified; Secretary of State Dean Acheson; Secretary of Defense Louis Johnson; Secretary of the Interior Oscar Chapman; and Joseph Feeney, Legislative Assistant to the President. All others unidentified.

Secretary of the Interior Oscar Chapman (standing) speaks to the Bureau of Reclamation's Operations and Maintenance Regional Supervisors during a conference at the Department of the Interior. Also pictured: Senator Joseph C. O'Mahoney (seated, right of Chapman). All others unidentified.

Attendees of the Bureau of Reclamation's Operation and Maintenance Regional Supervisors' Conference pose for a picture on the steps of the Interior building. Pictured, front row: Assistant Secretary of the Interior William Warne (second from left); Secretary of the Interior Oscar Chapman (center); and Bureau of Reclamation Commissioner Michael Straus (second from right). All others unidentified.

An unidentified man speaks to the Bureau of Reclamation's Operation and Maintenance Regional Supervisors during a conference at the Department of the Interior. Also pictured: Secretary of the Interior Oscar Chapman (along back wall, left); and Senator Joseph C. O'Mahoney (along back wall, right). All others unidentified.

Secretary of the Interior Oscar Chapman (center) with unidentified men from the Bureau of Reclamation's Operation and Maintenance Regional Supervisors' Conference at the Department of the Interior.

Secretary of the Interior Oscar Chapman (standing) speaks to the Bureau of Reclamation's Operations and Maintenance Regional Supervisors during a conference at the Department of the Interior. Also pictured: Bureau of Reclamation Commissioner Michael Straus (left, against wall); and Senator Joseph C. O'Mahoney (seated, right of Chapman). All others unidentified.

Members of the Cabinet greet President Harry S. Truman at Washington National Airport upon his return from a vacation in Key West, Florida. Pictured, foreground, left to right: President Truman; Secretary of the Interior Oscar Chapman; and Secretary of Defense Louis Johnson. All others are unidentified.