รัฐบาลสหรัฐแสดงความกังวลต่อคำขู่ของเกาหลีเหนือที่บอกว่าสามารถโจมตีฐานทัพสหรัฐบนเกาะกวม เกาะฮาวาย และแผ่นดินใหญ่อเมริกาได้
ความตึงเครียดทางการทหารในเกาหลีเหนือ
![Soldiers of the Korean People's Army take part in the landing and anti-landing drills of KPA Large Combined Units 324 and 287 and KPA Navy Combined Unit 597 in the east coastal area in North Korea, March 25, 2013.](https://gdb.voanews.com/a9edc124-854d-4481-a963-b565843dd75e_w1024_q10_s.jpg)
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Soldiers of the Korean People's Army take part in the landing and anti-landing drills of KPA Large Combined Units 324 and 287 and KPA Navy Combined Unit 597 in the east coastal area in North Korea, March 25, 2013.
![A North Korean soldier attends military training in an undisclosed location in this picture released by the North's official KCNA news agency, March 19, 2013.](https://gdb.voanews.com/6541fe98-db5b-4625-b323-c416aac45a62_w1024_q10_s.jpg)
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A North Korean soldier attends military training in an undisclosed location in this picture released by the North's official KCNA news agency, March 19, 2013.
![North Korean leader Kim Jong-Un talks with generals as soldiers of the Korean People's Army take part in landing and anti-landing drills in eastern North Korea, March 25, 2013.](https://gdb.voanews.com/ef5f1da8-73ba-4955-b540-e3970a14a625_w1024_q10_s.jpg)
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North Korean leader Kim Jong-Un talks with generals as soldiers of the Korean People's Army take part in landing and anti-landing drills in eastern North Korea, March 25, 2013.
![The North Korean shore as seen from South Korean island of Yeongpyeong.](https://gdb.voanews.com/e196ec73-ebaf-4a53-b494-b2301a498bf1_w1024_q10_s.jpg)
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The North Korean shore as seen from South Korean island of Yeongpyeong.