Thomas O. Jones volunteered to join the Army before the start of WWII. As the war began to unfold in Europe, Jones was placed in a sub-organization of the Army called the Counterintelligence Corps. Eventually, his work in the Counterintelligence Corps led him to being involved with the Manhattan Project. Jones oversaw many of the operations taking place in places like Chicago, Decatur and Ames, IA. He recounts witnessing three of the five bomb testings during his time working on the project.