Planes over water

AIR FORCE PHOTOS

Airman Bryce Willsey demonstrates how a portable breath test (PBT) is used Dec. 10, 2014, on Grand Forks Air Force Base, N.D. A PBT is used to test a subject’s blood alcohol content when the subject is believed to be intoxicated while driving. Willsey is a 319th Security Forces Squadron alarm monitor. (U.S. Air Force photo/Airman 1st Class Bonnie Grantham)

PHOTO BY: Airman 1st Class Bonnie Grantham
VIRIN: 141210-F-AT347-201.JPG
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