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What does North Korea need to do to strike North America?
Josh Elliott
September 19, 2017
Last Updated November 29, 2017
http://www.ctvnews.ca/features/icbm-101-what-does-north-korea-need-to-do-to-strike-north-america-1.3589497
Reentry of North Korea’s Hwasong-15 Missile
Thu, 12/07/2017
http://www.ucsusa.org/aggregator/sources/19#.Wi_yKtJl-1s
Can a North Korean Missile Hit the U.S.? Here’s What the Experts Say
ELI MEIXLER November 29, 2017
http://time.com/5040388/north-korea-icbm-missile-launch-mainland-us/ 작성자 청량산 작성시간 17.12.13