U.S. Air Force Staff Sgt. Christian Granados, ambulance service technician with the 52nd Medical Operations Squadron, conducts a function check on a pulse oximeter during a routine inspection in Building 137 on Spangdahlem Air Base, Germany, March 7, 2012. (U.S. Air Force photo by Senior Airman Christopher Toon/Released)
Airman 1st Class Christopher Toon
<a rel="nofollow" class="external free" href="https://www.dvidshub.net/image/642637">https://www.dvidshub.net/image/642637</a>