With new Western funding snarled in internal debates in both the US and EU, continuing to supply Ukraine with ammunition for its air defences has become existential. Two days before the New Year’s Eve celebration, the most important holiday in the Eastern European calendar,Russia launched its biggest missile barrage since the start of the war almost two years ago. Analysts say the attack was an attempt to both overwhelm Ukraine’s increasingly efficient air defences and deplete its stock of anti-missile ammunition at a time when resupplying Ukraine with more ammo is in increasing doubt. The hea…