US Monitors South Korean Skies To Check For Helium

A U.S. aircraft has flown over South Korea to check for the presence of radioactive materials, produced from the recent North Korean nuclear test. Sources said the United States is analyzing data gathered by the special reconnaissance aircraft and would compare the air sample with those gathered before the test. Results are likely to be available several days later. A North Korea expert asserted that U.S. officials would try to check for helium in the sample to confirm whether Pyongyang had conducted a hydrogen bomb test. However, the expert added that helium is difficult to collect as the amount generated from the test would likely be scant and it disintegrates quickly.

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