* Truman met often with Byrnes in the first few months of his Presidency.* But there are almost no records or notes of what they discussed.* And that was apparently Byrnes’ preference.* He was known as being paranoid about leaks.* a very devious politician* Truman referred to him as his “conniving” secretary of state* Historian […]

* By June 18 events had progressed to the point where Admiral Leahy was able to note privately in his personal diary:* It is my opinion that at the present time a surrender of Japan can be arranged with terms that can be accepted by Japan and that will make fully satisfactory provision for America’s […]

* On 15 August 1945, about a week after the bombing of Nagasaki, Truman tasked the U.S. Strategic Bombing Survey to conduct a study on the effectiveness of the aerial attacks on Japan, both conventional and atomic.* Did they have an effect on the Japanese surrender?* The Survey team included hundreds of American officers, civilians […]

Our guest today is Alex Wellerstein, a self-described “historian of science, secrecy, and nuclear weapons”. He’s a Professor of Science and Technology Studies at the Stevens Institute of Technology. He blogs here and is on Twitter here. He is also the creator of the NUKEMAP. Alex joined us to talk about the decision to drop […]

Kistiakowsky and his team armed the device shortly after 5am and retreated to the control bunker. Their final task was to switch on a string of lights on the ground that would serve as an ‘aiming point’. The air force wanted to know what the effect of the blast would be on a B-29 30,000 […]

Back to Alamogordo. The army leased a ranch in the middle of the Jornada del Muerto site and converted it into a military police station and field laboratory. They thoroughly vacuumed it to make a makeshift clean room and sealed its windows with black electrical tape. Just like Ray’s infamous kill room. Nearly 2 miles […]

Today we have a special guest – Jeff Hogue from the “History of the Cold War” podcast. We invited Jeff on to chat about his thoughts on the bombing of Japan.

On 6 June, Stimson again briefed Truman on S-1. * The briefing summarized the consensus of the Interim Committee, set up as an advisory group on atomic research.* It’s job was the advise on the proper use of atomic weapons in wartime and to develop a position for the United States on post-war atomic policy.* […]

* Which brings us to April 1945.* Only weeks before Germany surrendered on May 7, FDR dies.* And Truman takes over as POTUS.* He knew nothing of the Manhattan Project or the atomic bomb.* He was briefed on it immediately by Sec of War Stimson.* By the time Truman took office, Japan was near defeat.* […]

Of course, while the bomb was being designed, they had to figure out how they were going to deliver it. And WHO was going to deliver it. Way back in March 1944, the US Army Air Force, with William Sterling “Deak” Parsons and his team at Los Alamos, developed two bomb models and began testing […]