Nuclear Museum Logo
Nuclear Museum Logo

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.  

A Commendation for Delbert Johnson from President Harry Truman

Related Profiles

Frank Hollinger

Tinian Island

Frank Hollinger served in the 1395th Military Police Company, Aviation.

Goble Jackson

Tinian Island

Goble Jackson served in the 603rd Air Engineering Squadron.

C.A. Schopp Jr.

T-Plant/200 Areas

Schopp worked at the 200 West Area at Hanford during the Manhattan Project.

George Placzek

Princeton, NJ

George Placzek was a Czech physicist. He was born in Brno, Moravia, which was then part of Austria-Hungary but today is in the Czech Republic.