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Find and compare the largest empires throughout history by size, duration, location, and more. Learn about their leaders, their founders and the empires themselves.

The Nuclear Threat Initiative (NTI) is a non-profit organization with a mission to strengthen global security by reducing the risk of use and preventing the spread of nuclear, biological and chemical weapons.

Reuters.com brings you the latest news from around the world, covering breaking news in business, politics, entertainment, technology, and more in video and pictures.

JTA, the Jewish Telegraphic Agency, is the definitive source for American Jewish community news and opinion.

Find breaking news, multimedia, reviews & opinion on Washington, business, sports, movies, travel, books, jobs, education, real estate, cars & more.

Use Yahoo! News to find breaking news, current events, the latest headlines, news photos, analysis & opinion on top stories, world, business, politics, entertainment, sports, technology, and more.

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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.