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  1. The Semipalatinsk Test Site (STS or Semipalatinsk-21), also known as "The Polygon", was the primary testing venue for the Soviet Union's nuclear weapons.It is located on the steppe in northeast Kazakhstan (then the Kazakh SSR), south of the valley of the Irtysh River.

  2. Jun 16, 2022 · Entrance area of Tunnel 3 at the Punggye-ri nuclear test site in North Korea as of 14 April 2022. New satellite imagery may indicate North Korea is preparing to conduct another nuclear test at its ...

  3. Jun 16, 2022 · North Korea appears to be expanding work at its nuclear test site to include a second tunnel, a US-based think tank said on Thursday, as South Korean and US officials say North Korea might conduct ...

  4. Jun 03, 2022 · SEOUL, South Korea (AP) — President Joe Biden’s special envoy for North Korea said Friday the United States is “preparing for all contingencies” in close coordination with its South Korean and Japanese allies as it monitors North Korean arrangements for a possible nuclear test explosion that outside officials say could be imminent.

  5. May 27, 2022 · The second was the Milrow nuclear test, a 10 times more powerful bomb than Long Shot and was set off in 1969. The underground blast triggered a string of small earthquakes and massive landslides ...

  6. Jun 07, 2022 · By Brad Lendon and Yoonjung Seo, CNN South Korea and the United States put on an aerial show of force to North Korean leader Kim Jong Un on Tuesday, flying 20 fighter jets over waters west of the ...

  7. Life extension programs also require NNSA to certify the weapon’s protected period, its new lifetime, for 20 to 30 years. By extending the time that a weapon can safely and reliably remain in the stockpile, NNSA is able to maintain a credible nuclear deterrent without producing new weapons or conducting underground nuclear explosive tests.

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