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An experimental finding has emerged indicating that, contrary to the announcement of the Defense Ministry¡¯s Civilian-Military Joint Investigation Group (JIG), the adhesive substance found on the Cheonan and a torpedo propeller was not formed by an explosion. This is not something to be taken lightly, as it is scientifically incompatible with the government¡¯s announcement that the Cheonan was attacked with a torpedo launched by a North Korean submarine
In contrast with the JIG, which conducted just five experiments, including X-ray diffraction analysis, Jeong conducted a total of 11 experiments, including those five as well as a scanning electronic microscope analysis. This was a much more rigorous scientific procedure, and the results, according to Jeong, showed that the substance appeared to be Amorphous Aluminum Sulfate Hydroxide Hydrate (AASH), which is produced at temperatures below 100 degrees Celsius, rather than aluminum oxide formed under high-temperature explosion conditions, as the JIG announced.
Based on these findings, there is yet another serious flaw in the JIG¡¯s account, which used its own analysis of the substance as a basis for making the connection that the torpedo propeller salvaged at the site of the accident was debris from the very same torpedo that was used to attack the Cheonan. Along with the discovery of a clamshell in pristine condition in a small hole at the back of the propeller, this provides an additional strong basis for questioning the JIG¡¯s findings.