Senior Master Sgt. James Robbins observes his fire team during a stairwell clearing exercise March 5, 2014, at Silver Flag Alpha, 99th Ground Combat Training Squadron Range, Nev. Robbins is a 99th GCTS instructor and superintendent of operations. Staff Sgt.

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Keywords: 99, 99th, air, airforce, base, combat, creech, force, forces, gcts, ground, military, nellis, nev., security, squadron, states, training, united, usa