This decision follows Trump's disappointment with Putin after their phone call and after a Pentagon weapons delivery pause created confusion within his own administration.
Ukrainian officials intensified pleas for increased air defense support from allies after Russian missile strikes killed dozens of civilians in Kryvyi Rih and Sumy.
The scarcity of missiles for existing US Patriot batteries threatens Ukraine's ability to intercept Russian targets. Zelenskyy specifically highlighted America's capacity to strengthen Ukraine's air defenses.