Antony Blinken is on a trip to Kyiv, where he visited a children's hospital and met with U.S. Embassy staff. The U.S. announced nearly $3 billion in aid and weapons for Ukraine and other countries.
The north's stockpile of bullets and artillery rounds are compatible with Russia's weapons, but may be lower-quality. Transferring anything more powerful would get much more complicated.
Russia imposed personal sanctions Monday on 25 Americans, including actors Sean Penn and Ben Stiller, in response to U.S. sanctions against Russians stemming from the conflict in Ukraine.
Progress has been slow but Ukrainian military officers say U.S.-supplied rockets and training are making a difference from when NPR visited in the spring.