![](http://www.alamy.com/thumbs/6/8E1CADE7-464C-4FC1-B830-7206B6C891F7/R60JR7.jpg)
New York National Guard Soldiers and Airmen conduct command and control operations during Ardent Sentry 17 at the 42nd Infantry Division's Troy, armory on April 25, 2017. Ardent Sentry is an annual North American Aerospace Defense and Northern Command
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Photo credit: © Ted Small / Alamy / Afripics
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