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This picture of Hawaii was tweeted out by NASA astronaut Scott Kelly on the International Space Station with this comment: "Just flew over you
This picture of Hawaii was tweeted out by NASA astronaut Scott Kelly on the International Space Station with this comment: "Just flew over you

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    Hawaii set to test nuclear warning sirens

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Hawaii set to test nuclear warning sirens

Hawaii is preparing to test its nuclear warning siren system in the wake of renewed tensions between the US and North Korea. CNN's Christine Romans reports.

Hawaii set to test nuclear warning sirens

Hawaii is preparing to test its nuclear warning siren system in the wake of renewed tensions between the US and North Korea. CNN's Christine Romans reports.