Taking a sample
Senior Airman Daniel Bohn, 2nd Logistics Readiness Squadron Fuels Facilities, takes a sample of liquid oxygen as Staff Sgt. Mitchell Newman, 2 LRS Fuels Facilities, observes on Barksdale Air Force Base, La., April 4, 2013. The Airmen drew samples of liquid oxygen to test for particulates and odor. If either is found, the Airmen must determine what is causing the contamination and restore the oxygen to a useable state. (U.S. Air Force photo/Airman 1st Class Andrew Moua)