Airman 1st Class George Santiago, 319th Medical Operations Squadron medical technician, tests the hand washing skills of children at the Child Development Center Oct. 20, 2015, on Grand Forks Air Force Base, North Dakota. Santiago used Glo Germ to show the children how important it is to wash their hands properly. The black light exposed how many germs were still present after the children washed their hands. (U.S. Air Force photo by Airman 1st Class Ryan Sparks/Released)
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