moscow russia supply turkey four batteries s-400 surface-to-air missiles 2.5 billion deal almost complete sergei chemezov head russian state conglomerate rostec tell kommersant daily wednesday deal cause concern west turkey member nato russian missile system integrate nato military architecture addition relations moscow western military alliance strain part russia annexation ukraine crimea peninsula turkish defence minister nurettin canikli say ankara would purchase two s-400 systems four batteries agreements make state broadcaster trt haber report turkey pay 45 percent cost front russia provide loan cover remain 55 percent chemezov say moscow expect begin first deliveries march 2020 say chemezov tell kommersant turkey first nato member state acquire advance s-400 missile system say russian turkish finance ministries already complete talk finance deal final document need approve russia supply turkey four s-400 missile batteries 2.5 billion kommersant