Since the Patriot air defense system was first delivered to Ukraine, Kyiv has struggled with limited stocks of air defense missiles. According to some estimates, Russia launched 150 Iskander ballistic missiles against Kyiv, only seven of which were intercepted. According to some estimates, the war in the Middle East has consumed around 65% of the U.S.’s inventory of air defense missiles. According to some estimates, the Gulf states fired more than 1,100 Patriot missiles collectively since the start of the war. With the threat of Iranian ballistic missiles still present, the U.S. simply does not have missiles to spare at the moment.