Test sled set for run

 Uruguay > California > Kern County > China Lake

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Photograph caption dated March 4, 1957 reads, "Sled above is typical of types used on supersonic naval ordnance research track. It is four miles long and a step between wind tunnel and free-flight testing of airplanes. Rocket bottles at right blast test vehicle up to scorching speeds of 2,000 miles per hour." Location is approximate.