Signal for life
Senior Master Sgt. Scott Sperling, a flight engineer with the 109th Airlift Squadron, practices using a signal flare during air crew survival refresher training at the Minnesota Air National Guard base in St. Paul, Minn. on June 13, 2010. USAF official photo by Master Sgt. Dave Fenner
PHOTO BY:
Master Sgt. Dave Fenner
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IMAGE IS PUBLIC DOMAIN
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