Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Eugene S. Grennan

Flight Engineer on the Straight FlushHiroshima Mission

Tinian IslandWendover, UT
509th Composite GroupHiroshima MissionManhattan Project VeteranMilitary Veteran
The Straight Flush

Eugene S. Grennan served as a 2nd lieutenant in the 509th Composite Group. He was the flight engineer on the Straight Flush during the Hiroshima mission.

Related Profiles

Charles Dennis

Hanford, WA

Paul D. Krause

Chicago, IL

Paul D. Krause was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Nelson Tibbatts

Y-12 Plant

Nelson Tibbatts worked for the Tennessee Eastman Corporation at the Y-12 Plant.

S. Sobol

Oak Ridge, TN

S. Sobol worked for the United States Engineer District Office.