Moscow recently deployed two nuclear-capable bombers in Venezuela, triggering widespread speculation that the country was ready to face any military challenge stemming from the US.
Turkey's President Recep Tayyip Erdogan also says that the Middle East has to be cleansed of all nuclear weapons, in an apparent reference to Israel which is believed to be the only nation in the region to possess them.
US President Donald Trump welcomes the statement by North Korea and says he looks forward to a summit with Kim Jong-un.
In his state of the nation speech, the Russian president said a newly developed nuclear-powered cruise missile tested last year has a "practically unlimited" range, high speed and is easily manoeuvred.
The move, primarily aimed at Russia, could increase the risk of miscalculation between the two countries.
The clock serves as a metaphor for how close humanity is to destroying the planet. The last time it was at two minutes to midnight was in 1953 when the United States and Soviet Union were testing hydrogen bombs.
People in Japan had a scare last week when the public broadcaster mistakenly issued a missile launch alert. But Tokyo officials are not taking any chances—they held a drill, in case an attack does happen.
The International Campaign to Abolish Nuclear Weapons (ICAN) which brings together more than 450 organizations, was a driving force behind an international treaty on banning nuclear weapons that passed this year.
North Korea threatens a preemptive nuclear strike against the United States, as they accuse the western superpower of preparing an invasion.
How the nuclear bombing of Japan's Hiroshima and Nagasaki by the United States at the end of World War II dictated each nation's relationship with radiation in their stories for years to come.
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