Amid spiking global prices of grain, Russian Foreign Minister Sergey Lavrov met with his Turkish counterpart, Mevlüt Çavüşoğlu in Ankara today to negotiate a plan to allow safe passage of blocked Ukrainian wheat exports through the Black Sea. The two did not reach a formal deal, but pledged to meet again in Istanbul. But balancing competing interests will be difficult: Russia is demanding sanctions relief in return for security assurances, but Ukrainian officials say they do not believe Russia’s promises can be trusted.