Seoul, South Korea CNN —North Korea on Thursday showed off its long-range artillery systems, thousands of weapons that it could use to strike the South with little warning while causing tens of thousands of casualties, according to experts. North Korean leader Kim Jong Un observed both drills and was seen in photos provided by state media. North Korean artillery fires during large-scales exercises on March 7. Even retaliatory strikes by South Korea and the US would be difficult to execute, the report said. In January, Kim called the South the North’s “primary foe and invariable principal enemy” and ordered a reunification monument in the North Korean capital to be demolished.

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