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FILE - In this Saturday, Oct. 10, 2015 file photo,  North Korean leader Kim Jong Un waves at a parade in Pyongyang, North Korea. North Korea is preparing to hold a once-in-a-generation congress of its ruling party that is intended to rally the nation behind leader Kim Jong Un and could provide an important glimpse into Kims plans for the countrys economy and military. The congress is set to begin May 6, 2016. (AP Photo/Wong Maye-E, File)
FILE - In this Saturday, Oct. 10, 2015 file photo,  North Korean leader Kim Jong Un waves at a parade in Pyongyang, North Korea. North Korea is preparing to hold a once-in-a-generation congress of its ruling party that is intended to rally the nation behind leader Kim Jong Un and could provide an important glimpse into Kims plans for the countrys economy and military. The congress is set to begin May 6, 2016. (AP Photo/Wong Maye-E, File)

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    U.S., allies prepare to face North Korean missiles

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U.S., allies prepare to face North Korean missiles

South Korea and the U.S. will hold their first joint anti-missile drills in June in the Pacific. Can the North Korean missile threat be neutered? CNN's Brian Todd reports.

U.S., allies prepare to face North Korean missiles

South Korea and the U.S. will hold their first joint anti-missile drills in June in the Pacific. Can the North Korean missile threat be neutered? CNN's Brian Todd reports.