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Pedestrians watch the news on a huge screen displaying a map of Japan (R) and the Korean Peninsula, in Tokyo on August 29, 2017, following a North Korean missile test that passed over Japan.
Japanese Prime Minister Shinzo Abe said on August 29 that he and US President Donald Trump agreed to hike pressure on North Korea after it launched a ballistic missile over Japan, in Pyongyang's most serious provocation in years. / AFP PHOTO / Toshifumi KITAMURA        (Photo credit should read TOSHIFUMI KITAMURA/AFP/Getty Images)
Pedestrians watch the news on a huge screen displaying a map of Japan (R) and the Korean Peninsula, in Tokyo on August 29, 2017, following a North Korean missile test that passed over Japan.
Japanese Prime Minister Shinzo Abe said on August 29 that he and US President Donald Trump agreed to hike pressure on North Korea after it launched a ballistic missile over Japan, in Pyongyang's most serious provocation in years. / AFP PHOTO / Toshifumi KITAMURA        (Photo credit should read TOSHIFUMI KITAMURA/AFP/Getty Images)

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Japan calls NK missile 'most grave threat ever'

Japan's Prime Minister Shinzo Abe calls North Korea's latest missile launch over his country the "most grave threat ever." CNN's Will Ripley and Paula Hancocks report.

Japan calls NK missile 'most grave threat ever'

Japan's Prime Minister Shinzo Abe calls North Korea's latest missile launch over his country the "most grave threat ever." CNN's Will Ripley and Paula Hancocks report.