A thesis should cover, briefly, what key points you're going to be addressing in the rest of your essay. If you're going to have about two body paragraphs, each discussing (separately) how the U.S. secret endeavor harnessed nuclear power, and how the endeavor halted the Axis Powers, then this thesis statement is great. If you plan on discussing any other major key points that are separate from those, make sure to include them in the thesis. Hope this helped!
