Ukraine has said it hopes a United Nations-brokered deal aimed at easing global food shortages by resuming grain exports from the Black Sea region would start to be implemented this week. Moscow brushed aside concerns that the deal could be derailed by a Russian missile strike on Ukraine’s port of Odesa on Saturday, saying it targeted only military infrastructure. Ukraine’s President Volodymyr Zelenskyy has denounced the attack as “barbarism” that shows Moscow cannot be trusted. A global wheat shortage and soaring European energy prices are some of the most far-reaching effects of Russia’s invasion of Ukraine, threatening millions in poorer countries with hunger and prompting fears in Europe over heating supplies this winter. Al Jazeera’s John Hendren reports from Kyiv, Ukraine.