When NATO allies fail to deliver weapons and ammunition to Ukraine on time, “Ukrainians are paying the price,” Secretary General Jens Stoltenberg said on Monday in Kiev. “The lack of ammunition has enabled the Russians to push forward along the front line,” Stoltenberg said, singling out the United States for Washington’s protracted process to send more military aid. “European allies have not delivered the amount of ammunition they promised,” Stoltenberg added, referring to the European Union’s failure to deliver 1 million artillery shells to Ukraine in a year. The secretary general was speaki…