SEOUL, South Korea – North Korea has faster, more powerful tanks prowling the world's most heavily armed border and 200,000 special forces poised to carry out assassinations and cause havoc in South Korea, a major military review said Thursday.

Seoul's Defense Ministry report, released every two years, signals that the North's military threat has expanded. It comes as President Lee Myung-bak's administration scrambles to respond to criticism that it was unprepared for a Nov. 23 North Korean artillery attack on a front-line island that killed four people.
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