Hoover Dam<span>, once known as Boulder Dam, is a concrete arch-gravity dam </span>in<span> the Black Canyon ....</span>Construction<span> of a rail line joining Las Vegas and the dam site began </span>in<span> September </span>1930<span>. .... Falling objects were the most common cause of death on the dam site; the highscalers' work thus </span>helped<span>ensure</span><span> worker safety</span>
The mass production of steel. bessemer process <span />
The Democratic Party lost popularity and the 1952 election because of U.S. involvement in Korea. The heavy cost of the war in terms of money and American lives and the failure to win the war were partial reasons for the loss.
