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North Korea Severs 'Hotline' Communication With The South After Sanctions

North Korean authorities cut off their "hotline" communication with South Korea on Monday as part of their announced withdrawal from the armistice agreement that ended the Korean War in 1953. The move came amid a flurry of bellicose North Korean threats, coinciding with the beginning today of joint U.S.-South Korean military exercises. The White House also vowed anew to protect U.S. forces and South Korean allies against any threats from the North. Analysts say it is among the most dangerous moments on the Korean peninsula in several years.