The Patriot missile system is the United States' most advanced air defense system. Constructed by Raytheon Technologies, it can perform like an "air shield" against an aerial attack.

U.S. President Donald Trump said Ukraine would need Patriot missiles for its defenses, after speaking with President Volodymyr Zelenskiy on Friday, and voiced frustration over Russian President Vladimir Putin's failure to end the fighting.

Russia launched a record number of drones at Ukraine overnight into Friday, striking multiple buildings and residential areas, hours after US President Donald Trump said he had made “no progress” towards a ceasefire deal in a phone call with his Russian counterpart Vladimir Putin.