Delbert F. Johnson

Mechanical EngineerLos Alamos, NM

Trinity Site

Manhattan Project VeteranMilitary VeteranSpecial Engineer DetachmentTrinity Test Eyewitness

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.

A Commendation for Delbert Johnson from President Harry Truman

Related Profiles

Marie Cardwell

Y-12 Plant

Marie Cardwell arrived in Oak Ridge in February, 1945. She was hired as the Document Librarian for the Y-12 Plant and held for the remainder of the Manhattan Project, and for several decades afterwards.

W. S. Hall

Los Alamos, NM

Herbert D. Swasey

Tinian Island

Herbert D. Swasey served in the 603rd Air Engineering Squadron.

Otis L. Carter

Hanford, WA