How did the united states react to the soviet union�s development of an atomic bomb in 1949?

it initiated the non-proliferation treaty.
it launched a full scale attack on the soviet union.
it initiated peaceful negotiations with the soviet union.
it began to develop a weapon more powerful than the atomic bomb.

Read the excerpt. this is an example of a strong conclusion because it summarizes why the author thinks joan of arc is a significant historical figure. leaves out evidence that was already proven in the body of the essay. adds information that was originally omitted in the body of the essay. summarizes everything the author has written without providing an opinion.