There are also fears that Iran could soon supply Russia with hundreds of short-range ballistic missiles, which Kyiv would need advanced systems like the Patriot PAC-3 to shoot down.On Dec. 1, Ukrainian Defense Minister Olekssi Reznikov said Ukraine is "currently negotiating with the defense ministers of all countries that have S-300s in service regarding the possibility of replenishing stocks of missiles from their warehouses and arsenals."Slovakia signed a deal allowing the Czech Republic and Poland to patrol its airspace so it can supply its upgraded Soviet-era MiG-29 fighters to Ukraine without compromising its own air defenses.Nicosia has already hinted that it would consider making this Russian-built arsenal available for Ukraine provided it is guaranteed immediate replacements, citing the need to maintain its military strength to defend itself against Turkey.Nevertheless, receiving Greece's S-300 and other Russian systems in the Greek and Cypriot arsenals could also help Ukraine bolster its air defenses at this crucial moment when Kyiv needs everything it can get to fend off these drone and missile onslaughts."