Russia has a shortage of the air defense missiles it needs to fight drones: Ukraine's military chief One of Russia's primary weapons against Ukraine's drones is the Pantsir missile system. GIUSEPPE CACACE/AFP via Getty Images Oleksandry Syrskyi said Russia is facing a shortage of air defense missiles for drones. Ukraine is trying to exhaust Russia's air defenses this year with a long-range strike campaign. Analysts and Russian military bloggers have warned that the Kremlin's defenses are overstretched. Ukraine's commander in chief has said that Russia is running low on air defense missiles to counter drone strikes, suggesting that Moscow shares some of the West's stockpile concerns as the air war evolves. Oleksandr Syrskyi, the head of the Ukrainian military, made the remark during a meeting with Canada's defense chief in Kyiv on Sunday.…