I'm going to start a series of posts that highlight photographers that deserve recognition for their accomplishments. These photographers are not necessarily  on G+, or even alive in some instances such as this first photographer I'm about to highlight. Here is the hashtag to follow: #photographersyoushouldknow  

William Henry Jackson - http://en.wikipedia.org/wiki/William_Henry_Jackson

Jackson's photography work with the USGS in the early 1870's helped establish Yellowstone National Park as the world's first national park. 
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