Senior Airman Garrett Olson, 92nd Civil Engineer Squadron explosive ordinance disposal journeyman, uses a mass spectrometer to identify and quantify molecules in simple mixtures such as baking soda, acetone and gasoline during a Science, Technology, Engineering and Math tour hosted by the 92nd CES May 1, 2017, at Fairchild Air Force Base, Washington. The students received numerous hands-on demonstrations including night vision goggles and robotics. (U.S. Air Force photo/Senior Airman Mackenzie Richardson)