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A satellite photo of the Punggye-ri nuclear test site in North Korea on Wednesday. Digitalglobe hide caption

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Digitalglobe

North Korea Demolishes Its Nuclear Test Site In A 'Huge Explosion'

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President Trump meets with South Korean President Moon Jae-in on Tuesday in the Oval Office of the White House. Evan Vucci/AP hide caption

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Evan Vucci/AP

Trump Warns Summit With North Korea May Not Happen On Schedule

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Israeli Prime Minister Benjamin Netanyahu delivers a speech Monday in Tel Aviv on Iran's former nuclear weapons program. Jack Guez/AFP/Getty Images hide caption

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Jack Guez/AFP/Getty Images

North Korea's leader Kim Jong Un (left) and South Korea's President Moon Jae-in walk on a bridge at the truce village of Panmunjom Friday. South Korea says Kim told Moon of the plan to shut the test site. Korea Summit Press Pool via/AFP/Getty Images hide caption

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Korea Summit Press Pool via/AFP/Getty Images

A woman walks past a news screen showing file footage of South Korean President Moon Jae-in and North Korean leader Kim Jong Un at a railway station in Seoul this week. Kim will walk across the Demilitarized Zone on Friday for a historic summit with Moon. Jung Yeon-Je/AFP/Getty Images hide caption

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Jung Yeon-Je/AFP/Getty Images

What To Expect From Friday's Summit Between North And South Korea

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Pakistan test fires its new Ababeel surface-to-surface ballistic missile in Pakistan on Jan. 24, 2017. Ababeel has a maximum range of 1,350 miles and is capable of delivering multiple warheads using multiple independent re-entry vehicle technology, according to Pakistani sources. Anadolu Agency/Getty Images hide caption

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Anadolu Agency/Getty Images

On March 1, 1954, the U.S. conducted its largest nuclear test with a yield of 15 megatons. The new Russian weapon would be up to 100 megatons, according to reports. USAF Lookout Moutain Laboratory hide caption

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USAF Lookout Moutain Laboratory

Buried In Trump's Nuclear Report: A Russian Doomsday Weapon

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John Coster-Mullen Meredith Rizzo/NPR hide caption

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Meredith Rizzo/NPR

North Korea Designed A Nuke. So Did This Truck Driver

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A Hawaii Civil Defense Warning Device, which sounds an alert siren during natural disasters, is shown in Honolulu on Nov. 29, 2017. The alert system is tested monthly, but now Hawaii residents will hear a new tone designed to alert people of an impending nuclear attack by North Korea. Caleb Jones/AP hide caption

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Caleb Jones/AP

Nuclear Strike Drills Faded Away In The 1980s. It May Be Time To Dust Them Off

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South Korean and U.S. marine fighter jets fly over the Korean Peninsula during a training on Aug. 31, 2017 in Gangwon-do, South Korea. Handout/South Korean Defense Ministry hide caption

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Handout/South Korean Defense Ministry