The Ukrainian capital was blanketed by darkness Monday, even as this American ally was bolstered by a sense that its backer had — finally — seen the light.President Joe Biden has authorized Kyiv to use U.

The decision by President Biden will allow Ukraine to fire into Russia using US long-range missiles it's had for more than a year.

U.S. officials say a major factor in the shift in policy is the arrival of 10,000 North Korean troops in Russia, who are expected to fight alongside Russians to regain land in the Kursk region.