In a day of fast-moving diplomacy in Geneva, the US went from negotiating with Iran to mediating peace talks between Russia and Ukraine. Observers say hopes for a breakthrough in the third round of trilateral talks remain low. Moscow described the negotiations as “tense” and Kyiv downplayed hopes of reaching a deal as both sides try to find solutions to long-standing issues. William Denselow filed this report for CNA from Kharkiv, eastern Ukraine.