2nd Lt. Raza Alyas, 88th Aerospace Medicine bioenvironmental engineer, views the results of a test tube sample using a Chlorine DPD octet comparator, as part of a base exercise scenario revolving around a threat to the base’s critical water and infrastructure, at Wright-Patterson Air Force Base, Ohio, Feb. 2, 2017. Individual test samples were used to determine the PH, conductivity, turbidity, free available chlorine and total chlorine of the water.

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Keywords: air, america, archive, armed, army, defence, force, forces, military, navy, reportage, service, serviceman, servicemen, soldier, states, united, usa