Three honor guard Airmen lower the flag during a Patriot Day Retreat ceremony Sept. 11, 2017, at McConnell Air Force Base, Kansas. Local law enforcement officers also attended the ceremony to honor the first responders of the 9/11 terrorist attacks. ( Air Force photo by Airman 1st Class Erin McClellan)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: 9/11, air, base, ceremony, day, force, guard, honor, mcconnell, patriot, retreat