Commemorative Boulder Still Stands 75 Years Later

In 1951, President Harry S. Truman dedicated this boulder and placard for the establishment of Arnold Engineering Development Complex. Seventy-five years later, the commemorative boulder still stands as a centerpiece beneath the colors at Arnold Air Force Base, Tenn.

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Commemorative Boulder Still Stands 75 Years Later

In 1951, President Harry S. Truman dedicated this boulder and placard for the establishment of Arnold Engineering Development Complex. Seventy-five years later, the commemorative boulder still stands as a centerpiece beneath the colors at Arnold Air Force Base, Tenn.

Photo Details / Download Hi-Res

Commemorative Boulder Still Stands 75 Years Later

Published March 27, 2026
By Keith Thornburgh
AEDC Public Affairs

ARNOLD AIR FORCE BASE, Tenn. -- In 1951, President Harry S. Truman dedicated this boulder and placard for the establishment of Arnold Engineering Development Complex. Seventy-five years later, the commemorative boulder still stands as a centerpiece beneath the colors at Arnold Air Force Base, Tenn.