U.S. Air Force Airman 1st Class Vanessa Nava, 18th Security Forces defender, is asked to say how many fingers she can see during Taser and oleoresin capsicum (OC) spray training July 20, 2017, at Kadena Air Base, Japan. The OC spray causes a temporary blindness that helps assist in apprehension. (U.S. Air Force photo/ Airman 1st Class Greg Erwin)