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Since 1928 the figures on bills printed for the general public have remained the same - Our familiar Washington, Lincoln, Hamilton, Jackson, Grant and Franklin. But the United States has had many different kinds of federally printed paper money, and many different people have adorned it.
On February 27, 1942 a three decades old US Navy ship was attacked by Japanese aircraft and sunk. It was a difficult time for the allies, many ships were lost that day. But the sinking of USS Langley represented the end of one of the most consequential ships is the Navy's history.
The road to plentiful aluminum was long, and literally dozens of important scientists were involved over a period of centuries in the effort to purify the metal. In the end, the solution would come almost simultaneously from two scientists, each just 22 years of age.
