Meteorologists release a "Sonde-Track" weather balloon from the observation deck of Washington National Airport
Washington DC USA Date:1941 Duration:43 sec Sound:NO SOUND
A man holds a weather balloon containing an instrumentation package in container labeled: "Sonde-Track." (The sonde or radiosonde is a balloon-borne sounding system to measure atmosphere and winds). Three officials hold the package and show a notice on its side addressed to whomever finds the balloon. The balloon is released and floats upward.
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