U.S. Department of Defense no topic Update
U.S. Department of Defense sent this bulletin at 05/06/2013 07:21 AM EDT
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05/06/2013 06:13 AM CDT
As of April 2013, the Smithsonian National Air and Space Museum began to examine the cultural and technological history of precise timekeeping and navigation at sea, in the air, and in space, and the impact of satellite navigation on our everyday lives. The exhibit, TIME and NAVIGATION, will explore ‘how revolutions in timekeeping over three centuries have influenced [...]
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