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World Trade Center
(Encyclopedia)World Trade Center, former building complex in lower Manhattan, New York City, consisting of seven buildings and a shopping concourse on a 16-acre (6.5-hectare) site; it was destroyed by a terrorist a...sarin
(Encyclopedia)sarin zärēnˈ [key], volatile liquid used as a nerve gas. It boils at 147℃ but evaporates quickly at room temperature; its vapor is colorless and odorless. Chemically, sarin is fluoroisopropoxymet...Ridge, Tom
(Encyclopedia)Ridge, Tom (Thomas Joseph Ridge), 1945–, U.S. politician and government official, first secretary of Homeland Security (2003–5), b. Munhall, Pa. A graduate of Harvard (1967) and the Dickinson Scho...biological warfare
(Encyclopedia)biological warfare, employment in war of microorganisms to injure or destroy people, animals, or crops; also called germ or bacteriological warfare. Limited attempts have been made in the past to spre...Chertoff, Michael
(Encyclopedia)Chertoff, Michael, 1953–, U.S. government official, b. Elizabeth, N.J., grad. Harvard (B.A., 1975, J.D., 1978). A lawyer, Chertoff was an assistant federal prosecutor in New York (1983–87) and New...bin Laden, Osama
(Encyclopedia)bin Laden, Osama or Usama ōsäˈmə bĭn lädˈən, ŭsäˈmə [key], 1957?–2011, Saudi-born leader of Al Qaeda, a terrorist organization devoted to uniting all Muslims and establishing a transnati...Chechnya
(Encyclopedia)Chechnya chəchĕnˈ [key], republic (1990 est. pop. 1,300,000, with neighboring Ingushetia), c.6,100 sq mi (15,800 sq km), SE European Russia, in the N Caucasus. Grozny is the capital. Prior to 1992 ...Islamic State
(Encyclopedia)Islamic State (IS), Sunni Islamic militant group committed to the establishment of an Islamic caliphate that would unite Muslims in a transnational, strict-fundamentalist Islamic state. IS has been ma...Abdullah bin Abdul Aziz
(Encyclopedia)Abdullah bin Abdul Aziz äbdo͝olˈlä ĭbˈən ăbdo͝olˈ ăzēzˈ [key], 1924–2015, king of Saudi Arabia (2005–15), b. Riyadh. Like his predecessor, King Fahd, he was a son of Saudi Arabia's fo...National Security Agency
(Encyclopedia)National Security Agency (NSA), an independent agency within the U.S. Dept. of Defense. Founded by presidential order in 1952, its primary functions are to collect and analyze communications intellige...Browse by Subject
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