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National Museum of Nuclear Science & History

Delbert F. Johnson

Mechanical EngineerLos Alamos, NM

Trinity Site
Manhattan Project VeteranMilitary VeteranSpecial Engineer DetachmentTrinity Test Eyewitness
Delbert Johnson

Delbert Johnson was a mechanical engineer with the Special Engineer Detachment (SED) at Los Alamos. Johnson worked under 1st Lieutenant Howard C. Bush and witnessed the Trinity site explosion on July 16, 1945. After the bomb test, Johnson was one of the first to enter the crater to conduct scientific measurements.  

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