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A tracer round streaks through the snowy combat arms training range Nov. 4, 2015, at Eielson Air Force Base, Alaska. The tracers, along with night vision goggles, flashlights and laser sights, were
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![Squadron of planes flying overhead with fiery trails of tracers, flak or projectiles streaking up towards them as ammunition fired in combat or during a gunnery training exercise. - Stock Video Footage - Squadron of planes flying overhead with fiery trails of tracers, flak or projectiles streaking up towards them as ammunition fired in combat or during a gunnery training exercise. - Stock Video Footage -](http://cdn9.dissolve.com/p/D91_3_219/D91_3_219_0004_600.jpg)