Analysis of information sources in references of the Wikipedia article "Không quân Nhân dân Triều Tiên" in Vietnamese language version.
North Korea has stepped up the number of training flights since last month to as many as 650 sorties a day. The North Korean air force is conducting training flights even on weekends [...]
North Korea has stepped up the number of training flights since last month to as many as 650 sorties a day. The North Korean air force is conducting training flights even on weekends [...]
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