nuclear tests in three elements
61Signals intelligence in modern history — This article is a subset article of the article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with signals intelligence in the… …
62Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
63atom — /at euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical… …
64Uranium — (pronEng|jʊˈreɪniəm) is a silvery gray metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. It has 92 protons and 92 electrons, 6 of them valence electrons. It can have between 141 and …
65Technetium — molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re …
66Teller–Ulam design — The basics of the Teller–Ulam design. Radiation from a primary fission bomb compresses a secondary section containing both fission and fusion fuel. The compressed secondary is heated from within by a second fission explosion. The Teller–Ulam… …
67European Union — 1. an association of European nations formed in 1993 for the purpose of achieving political and economic integration. Formerly known as the European Economic Community, the European Union s member states are Austria, Belgium, Denmark, Finland,… …
68Atom — The atom is the smallest unit of an element that retains the chemical properties of that element. An atom has an electron cloud consisting of negatively charged electrons surrounding a dense nucleus. The nucleus contains positively charged… …
69Air Force reports on the Roswell UFO incident — The two Air Force reports on the Roswell UFO incident, published in 1994/5 and 1997, form the basis for much of the skeptical explanation for the 1947 incident, the purported recovery of aliens and their craft from the vicinity of Roswell, New… …
70World Affairs — ▪ 2004 Introduction Dominating the international scene in 2003 were the U.S. led war in Iraq and the worldwide reaction to the invasion, which occurred without the sanction of the UN Security Council; the ouster of Charles Taylor in Liberia; the… …
