Europe's largest nuclear power plant was hit by Russian shelling early Friday, sparking a fire at one of its six reactors and raising fears of a disaster that could affect all of central Europe for decades, like the 1986 Chernobyl meltdown.
Here's a look at key things to know about the conflict Saturday.
Continuing a 29-year unbroken practice, India and Pakistan on Wednesday exchanged a list of their nuclear installations under a bilateral arrangement that prohibits them from attacking each other's atomic facilities.
The 2017 nuclear test by North Korea shifted the ground by a few metres and was 17 times more powerful than the bomb dropped on the Japanese city of Hiroshima in 1945, according to scientists from ISRO.
The US is regularly pummelled by hurricanes. In 2017 one named Harvey became the strongest hurricane to make landfall in 12 years.
The defence minister said this on Twitter after visiting Pokhran where India carried out nuclear tests in 1998 when Atal Bihari Vajpayee was the prime minister.
The National Command Authority controls policy formulation, exercises, deployment, research and development, employment and operational command and control of the country's nuclear arsenals.