US President Joe Biden said on Tuesday that the threat of his Russian counterpart Vladimir Putin to use tactical nuclear weapons is "real".
When I was here about two years ago saying I was worried about the Colorado River drying up, everyone looked at me like I was crazy," Biden told a group of donors in California today.
"And they looked at me the same way when I said I was worried about Putin using tactical nuclear weapons. That's true." Biden said.
Belarusian President Alexander Lukashenko said last week that his country had begun receiving Russian tactical nuclear weapons, some of which he said were three times more powerful than the atomic bombs dropped by the United States on Hiroshima and Nagasaki in 1945.
This is the first time Russia has moved such materiel - shorter-range, less powerful battlefield nuclear weapons - outside its borders since the fall of the Soviet Union.