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Master Sgt. Gordy Heinen and Tech. Sgt. Steven Hayes acquire Global Positioning Satellite signals on two dropsondes before the first operational test of the Screamer 2k Joint Precision Air Drop System Aug. 31 over Afghanistan. The dropsondes calculate wind speed and relay the information back to the aircraft, helping calculate the correct drop point. Sergeant Heinen is a loadmaster with the 774th Expeditionary Airlift Squadron. Sergeant Hayes is a loadmaster with the Air Mobility Warfare Center. (U.S. Air Force photo/Senior Airman Brian Ferguson)
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