Ukraine’s shortage of ammunition and military equipment resulting from the US and its allies’ struggle to resupply the country’s military is having an increasingly dire effect on the battlefield, US and NATO officials are warning, as Russia intensifies its attacks on Kyiv’s dwindling air defenses knowing that they likely won’t be replenished anytime soon. The Ukrainian military is “experiencing shortages in air defense munitions, mostly in the medium to long range,” a NATO official said on Wednesday. “It’s not just that we know that. It’s that Russia knows that. So Russia is using drones and missiles in ways that are...