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2013 $1 American Silver Eagle Bullion Great free interest Mint In US coin Box Gift

2013 $1 American Silver Eagle Bullion coin In US Mint Gift Box


2013 $1 American Silver Eagle Bullion coin In US Mint Gift Box


Item specifics

Strike Type:
Brilliant Uncirculated
Precious Metal Content per Unit:
1 oz
United States Mint
Modified Item:
United States Mint
Silver Eagle
Country/Region of Manufacture:
United States
Total Precious Metal Content:
1 troy oz

2013 $1 American Silver Eagle Bullion coin In US Mint Gift Box

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Dropping Giant Rolls of Film From Satellites to Spy from Space

  By Allison Kubo More cold war science in case you enjoyed our last cold war science article: the atomic-powered-nuclear-weapon-silo-ice-sculpture. In 1958, the Central Intelligence Agency started project Corona, a top-secret mission to perform photographic surveillance of the Soviet Union. Of course, this is before digital cameras. Current digital cameras use charge-coupled devices (CCD) which an array of capacitors transfer the photons that hit them into electrical signals. Although the development of the CCD began only a year after Project Corona, it wasn’t until the 1970s that it was employed by the military for imaging. However, before digital cameras film, photographic emulsions were used. These work in a similar way, except the light, hits a crystal in the film and changes its orientation. After the film is exposed to light, it must be developed in various chemical baths to “fix” the film so that it can be examined. The Corona Project consisted of a series of eight s
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