A traffic stop in Pottawattamie County Tuesday night on a vehicle with an improper registration plate, resulted in the arrest of a man on an OWI charge. Pott. County Sheriff’s Officials say 55-year old Robert Wayne Henry, of Macedonia, was arrested at around 7:30-p.m. for OWI/2nd offense after a Deputy observed an odor of alcohol. Henry took a standard Field Sobriety Test at the scene, but refused to take a Preliminary Breath Test.