The American-made Patriot surface-to-air missile system has been a workhorse for Kyiv in defending against Russian attacks.

The acquisition goal for the Patriot Advanced Capability-3 missile segment enhancements would quadruple—from 3,376 to 13,773—if Congress grants the Pentagon’s request, according to procurement justification documents released by the Army.

President Trump's decision Monday to send defensive weapons to Ukraine followed days of consultations with aides and other world leaders about where those arms would actually come from. Why it matters: The Trump Administration had paused shipments of some arms to Ukraine,