Proving grounds

Secretary of the Army Frank Pace, Jr. (center) with unidentified soldiers at White Sands Proving Ground, New Mexico.

Secretary of the Army Frank Pace, Jr. at White Sands Proving Grounds, New Mexico. From left to right: Pace, Dr. Louis Dunn, General Manton Eddy, and Mr. J.S. Piech. The men working in the background are unidentified.

Secretary of the Army Frank Pace, Jr. (probably third from the left) at White Sands Proving Grounds, New Mexico with a group of unidentified men and armed forces officers, viewing weapons testing with binoculars.

Secretary of the Army Frank Pace, Jr. (center) with unidentified soldiers at White Sands Proving Ground, New Mexico.

Secretary of the Army Frank Pace, Jr. with an unidentified United States Army officer saluting at White Sands Proving Grounds, New Mexico.

On the main firing front at Aberdeen Proving Grounds, President Harry S. Truman (with binoculars) examines a target through his binoculars. Others observing the demonstration, left to right: General E.L. Ford, General E.E. MacMorland, General Harry Vaughan, and General J. Lawton Collins.

President Harry S. Truman (inside windowed shelter, third from the left) and other unidentified dignitaries attending a weapons demonstration at Aberdeen Proving Ground in Maryland.

President Harry S. Truman (in civilian clothes) reviewing soldiers at Aberdeen Proving Ground. Walking behind President Truman is Major General Edward MacMorland, Commanding Officer of Aberdeen Proving Ground. Others are unidentified.

Artillery demonstration at Aberdeen Proving Ground. President Harry S. Truman (not pictured) attended this demonstration.

President Harry S. Truman and other dignitaries during a military demonstration at Aberdeen Proving Ground in Maryland. Front row, left to right: Major General Edward MacMorland, Commanding Officer, Aberdeen Proving Ground; President Truman; General J. Lawton Collins. Second row: Averell Harriman (second from right) and Secretary of the Army Frank Pace (right). Third row: General Harry Vaughan (right). Admiral Robert Dennison is in the row behind General Vaughan, second from the right. All others are unidentified.