05/22/2026
Another fan with a personal connection to the B-29, Jim Dunigan, wrote to share his grandfather's story. Some details in it may differ from the documented historical record, but this is a family history passed down over generations. We share it in that spirit:
❝
I wanted to thank you all for your hospitality, and thanks for letting me sit in my grandfather's position on board "FIFI". It was the highlight of my visits.
I brought my grandfather's wings with me to take pictures with at his flight station.
My grandfather was F/O. James F. Dunigan. He served under the command of Col. Paul W. Tibbetts, U.S. 509th Composite Group, as a Flight Engineer/Aircraft Observer.
He never made it over to Tinian to join the rest of the advanced elements of the 509th. His flight, along with another were sitting on the tarmac at Hamilton Army Airfield, California, "waiting for the order to go". He, along with the two flights, remained at Hamilton for a few days; they were ordered not to leave their aircraft, chow and everything they'd need would be brought to them. They were under strict secrecy while on the ground at Hamilton.
They were to be ordered to Tinian if the two "devices" didn't lead to Japanese capitulation. The 509th's designation was (A) for Atomic. If the "devices" didn't work? Upon arrival, the 509th was to become one heavy bombardment group amongst the 20th U.S. Army Air Force, and their designation would change to (H) for heavy. They would begin softening up the Japanese home islands for Operation Downfall, the Invasion of Japan.
It was my grandfather's flight that came up with the technique to release the "device" without being destroyed or suffering damage from the initial nuclear blast radius when coming off the IP.
After a few days, they were told: "We just dropped the first 'device', we're going to drop the second in a couple of days... they can't hold on for much longer...". They were ordered back to Kirtland Army Airfield, New Mexico, and their flights were broken up and sent off to other commands.
My grandfather remained in the U.S. Army Air Forces until 1946, when he was honorably discharged from the service.
I'd like to share a few images with y'all. Feel free to make a post. I don't mind. I'm just happy to share his unique and largely forgotten story with the U.S. 509th Composited Group with y'all.
❞
Thank you for sharing his story with us, Jim, and our gratitude for your grandfather's service.