You do not have to conduct outside research. Use APA or MLA for citations. *Review the problem of the U.S. defense budget and nuclear proliferation . Include class lectures, discussions, and videos.* you have to use this site below : https://www.washingtonpost.com/news/wonk/wp/2013/01/07/everything-chuck-hagel-needs-to-know-about-the-defense-budget-in-charts/ and the file in the attachment to answer this question. so use both for the writing.