Ukrainian President Volodymyr Zelenskyy has written an open letter to his Russian counterpart Vladimir Putin, urging him to attend a meeting between the two leaders at a neutral location to agree an end to the war.The letter says that with Washington “fully focused” on the conflict with Iran, “it would be wrong to simply wait” for this to change --although it also stresses that the United States and European nations should be involved in the peace process.“Ukraine is ready for a full cease-fire for the duration of the negotiations. This is standard practice, and current developments around Iran only reinforce that point,” Zelenskyy wrote, also proposing an exchange of all prisoners-of-war held by each side.Zelenskyy’s letter comes five years into Russia’s full-scale invasion, with Ukrainian forces battling Russian troops to a near standstill.As front lines dominated by drone warfare barely shift, Russia has continued to pound Ukrainian cities with missiles and drone strikes on civilian targets in an apparent effort to undermine morale.The latest attack, on June 2, was so intense that it shocked Ukrainians who have already endured years of bombardment. Six people were killed in Kyiv, 16 in Dnipro, and dozens were injured.