A representative of the United Nations World Food Program warned on Sunday that Russia is blocking close to 4.5 million tons in grain exports from Ukraine, The Guardian reported. Martin Frick told German news outlet dpa that the abrupt stoppage could initiate a global food crisis and that he is working to allow the supply to go forward. “Foodstuffs have to reach those in Ukraine who are trapped and in need. But at the same time, there is the need to provide other parts of the world with foodstuffs they are expecting from Ukraine in order to alleviate a global...