MOSCOW, June 23 (RIA Novosti) - Russia is not opposed to an EU mission replacing the UN force in Kosovo, but the move should have the formal backing of the UN Security Council and Serbia, a senior Russian diplomat said on Monday. "We are not opposed to the European Union taking on part of the responsibility for what is happening in Kosovo," Vladimir Chizhov, envoy to the European Communities, said adding a European mission should be approved by a UN Security Council resolution and Belgrade. Chizhov said UN Security Council Resolution 1244 was currently the only legal basis for an...