Dr. Greg Zacharias, Air Force Chief Scientist (left), listens as Dr. Donald Venable and Mark Smearcheck, both electronics engineers with the Air Force Research Laboratory’s Sensors Directorate, discuss the Precision Navigation and Timing (PNT) Open Architecture during DoD Lab Day, May 18 at the Pentagon center courtyard. ( Air Force photo/Mikee Huber)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: 2017, day, dod, lab