TEHRAN, Iran (AP) — Russian President Vladimir Putin arrived today in Iran for a visit intended to deepen ties with regional heavyweights as part of Moscow’s challenge to the United States and Europe amid its grinding campaign in Ukraine. Turkey, a NATO member, has found itself opposite Russia in bloody conflicts in Azerbaijan, Libya and Syria. Israel maintains good relations with Putin, a necessity given Russian presence in Syria, Israel’s northeastern neighbor and frequent target of its airstrikes. In his fifth visit to Tehran, Putin will meet Iran’s Supreme Leader Ayatollah Ali Khamenei, with whom he has a “trusting dialogue,” Putin’s foreign affairs adviser Yuri Ushakov said. Talks to lift a Russian blockade and get Ukraine’s grain into global markets will also be on the agenda.