發文之前我努力查找這個數字也無法確定。
1，按照 ohiohistorycentral.org/w/Manhattan_Project 中介紹的是：
Eventually 130,000 people participated in the Manhattan Project.
2，blog.nuclearsecrecy.com/2013/11/01/many-people-worked-manhattan-project/ 說：
over 560,000 people left their jobs on the Manhattan Project by December 1946. 還說：
I don't think it's too far off to assume that probably half a million people were employed to make the bomb.
