The researchers say larger class sizes are another possible reason for the increase in injuries.
VOA: special.2009.08.06
Investigators say they are looking at every possible reason for the shooting.
VOA: special.2009.11.14
Hyun adds,the North Korean leader also has to think about possible power succession, whether it happens right away or some time later- that is another reason to reinforce his power base.
VOA: standard.2009.06.22
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