russia decide ignore obama red line sell missiles iran weak leader like obama wonder putin thumb nose us russia announcement monday proceed sale advance missile systems iran cross so-called red line establish obama administration 2010 accord comment senior administration officials.following years dissent unite state russia announce monday would proceed sale advance s-300 air defense missile system iran vie purchase hardware years.the announcement spark criticism obama administration pressure iran since least 2010 withhold sale.russia previous ban sell tehran powerful defense system hail coup obama administration promote example president obama ability rein russian intransigence military front.however monday announcement russia threaten complicate already fracture relationship moscow throw jeopardy ongoing negotiations tehran nuclear program.experts warn reversal threaten split international coalition currently work halt iran nuclear program narrative white house work downplaythe russian executive order effectively lift ban transit s-300 air defense missile systems via russian federation territory include air export russian federation islamic republic iran transfer s-300 islamic republic iran outside russian federation territory use ship aircraft fly russian federation flag accord announcement moscow.russia decision arm tehran s-300 system erode long-promoted narrative obama administration success prevent russian proliferation.read wfb russia sell missiles iran defiance obama red line