Understanding Homeland Security  John E. Peters Fathom Fathom is the leading source for online learning. The company's website (www.fathom.com) offers unprecedented opportunities for professional development and lifelong learning through authenticated online education opportunities. Online courses and free seminars together with lectures, interviews, articles and exhibits are available through Fathom, as well as books and other products. Authoritative reference content spans all disciplines and fields of study. Eric V. Larson Eric Larson (Ph.D., Policy Analysis, RAND Graduate School) is a policy analyst at RAND with nearly two decades of experience, primarily in national security and foreign affairs. John E. Peters John E. Peters (Ph.D., International Relations, Georgetown University) is a senior researcher at RAND whose research interests include foreign policy, U.S. and European security strategy, and force employment.