Keith Custer, 102nd Precision Measurement Equipment Laboratory technician, checks parallelism boresight at Otis Air National Guard Base, Mass., May 1, 2020. The 102nd PMEL provides precision calibration and measurement for nine different Air Force and Air National Guard flying missions, as well as support for District 1 of the U.S. Coast Guard. The Otis PMEL has seen an increase of 25% for cold room work in part due to the pandemic. (U.S. Air Force photo by Master Sgt. Kerri Spero)
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