Sgt. Christopher Johnson, an aerial gunner instructor with Marine Heavy Helicopter Squadron 465 "Warhorses" and a Youngstown, Ohio, native, watches the skies during a training mission in the desert outside of El Centro, Calif., July 17. Johnson demonstrat

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Sgt. Christopher Johnson, an aerial gunner instructor with Marine Heavy Helicopter Squadron 465 "Warhorses" and a Youngstown, Ohio, native, watches the skies during a training mission in the desert outside of El Centro, Calif., July 17. Johnson demonstrated and evaluated the use of GAU-21 .50 caliber weapon systems to Staff Sgt. Franklin Williams, an aviation ordnance technician with Marine Heavy Helicopter Squadron 465 "Warhorses" and a San Diego native, during the mission.

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