Airman 1st Class Nathanael Markley, 36th Logistics Readiness Squadron cryogenics lab technician, holds a beaker with liquid oxygen on Andersen Air Force Base, Guam. The 36th LRS cryogenics production technician team is one of two base-level cryogenics teams left in the Air Force that still makes all of its own products. (U.S. Air Force photo by Airman 1st Class Adarius Petty)