Senior Master Sgt. James Robbins demonstrates proper building clearing procedures in an urban environment March 5, 2014, at Silver Flag Alpha, 99th Ground Combat Training Squadron Range. Robbins is the superintendent of operations and also an instructor for the GCTS. Staff Sgt. Nadine Barclay)

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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