air-hardened steel
121Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …
122Disney bomb — Disney Bomb …
123Nuclear weapons and the United Kingdom — United Kingdom Nuclear program start date 10 April 1940 First nuclear weapon test 2 October 1952 First fusion weapon test …
124SM-65 Atlas — Main article: Atlas (rocket family) B 65/SM 65/CGM 16/HGM 16 Atlas Launch of an SM 65A Atlas from LC 12, Cape Canaveral Air Force Station, 20 February 1958 Type …
125Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… …
126Nuclear bunker buster — Subsidence craters left over after underground nuclear (test) explosions Bunker busting nuclear weapons, also known as earth penetrating weapons (EPW), are a type of nuclear weapon designed to penetrate into soil, rock, or concrete to deliver a… …
127United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… …
128Spain — /spayn/, n. a kingdom in SW Europe. Including the Balearic and Canary islands, 39,244,195; 194,988 sq. mi. (505,019 sq. km). Cap.: Madrid. Spanish, España. * * * Spain Introduction Spain Background: Spain s powerful world empire of the 16th and… …
