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On this day: July 4

Published On: Jun 27 2012 04:29:44 PM CDT   Updated On: Jul 04 2013 01:00:00 AM CDT

A country is born -- and later expands, an "Iron Horse" retires, and we lose three presidents, all on this day.

July 4 OTD - Mars Pathfinder
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NASA Image

1997: NASA's Pathfinder space probe lands on the surface of Mars.

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