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Vehicle and equipment movements were captured at the North Changdong engine test site. The United States is also sending reconnaissance planes to the Korean peninsula. The North and the United States are raising pressure as they deliberately show sensitive military information to their opponents.

Kim Tae-hoon is a defense journalist.

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This is a satellite photo of North Korea's Dongchang-ri Engine Test Site, released by 38 North American media.

It has been taken since the last seven days of North Korea's engine test, and I see objects that I suspected were unprecedented 10m long trucks and cranes.

North Korea's Pungggye-ri Nuclear Test Center, which was blown up last year, had no human activity in November alone.

A military official said, "Even though we know that North Korea is exposed to US and US military authorities, we seem to be sending a message suggesting provocation by mobilizing vehicles and equipment."

In response, the United States has been sending reconnaissance aircraft to the Korean peninsula for the whole week.

Today (13th) launched a Cobra Ball to track the movement of ballistic missiles and P-3 patrols to monitor sea and submarines.

It appears to be intended to pressure North Korea by intentionally exposing it to a civil aviation tracking site.

The voice of the United States is also strengthening in response to the harsh words of major North Koreans heading for confrontation instead of dialogue.

[David Steelwell, Assistant Secretary of State for East Asia: Reminds me that I can no longer accept this sorry and indiscriminate action. The US position has not changed.]

As the year-end negotiation deadline set by North Korea approaches, North Korea seems to be struggling to raise the pressure level with words and actions.

(Image editing: Lee Seung-yeol, CG: Kang Yu-ra)

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