U.S. will send Ukraine at least $275 million in new weapons in push to bolster Kyiv ahead of Trump

Two days after President Joe Biden authorized Ukraine to use U.S.-supplied Army Tactical Mission Systems (ATACMS) to strike military targets deeper into Russia, Russian President Vladimir Putin made his own formal announcement about a change to Russia's nuclear doctrine.

The latest tranche of weapons comes as worries grow about an escalation in the conflict, with both sides pushing to gain any advantage that they can exploit if Trump demands a quick end to the war -- as he has vowed to do.

President Joe Biden’s decision to allow Ukraine to use long-range missiles in its war with Ukraine has proved to be quite controversial.

Russia launched a barrage of missiles at Ukraine Thursday in its first major retaliation for Ukraine's attack earlier in the week on a military facility in the Russian region of Bryansk.