caption: U.S. Air Force Staff Sgt. <PERSON>, 532nd Expeditionary Operations Support Squadron meteorologist ties the radiosonde to the weather balloon before launching it at Al Asad Air Base, Iraq, May 28 2011. The radiosonde travels up with the weather balloon to transmit data back to a computer telling the wind speed, atmospheric pressure, temperature and humidity. (U.S. Air Force photo by Senior Airman <PERSON>)
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