u.s. and it s at lies have agreed to a framework of a deal has led to russias decision to ply iran with correspondent air defenses. reporter: we think that given the conditions in the region tick any mri relation with the events in yemen the supplies of this type of weaponry are a deterrent factor. reporter: a deterrent for iran and a symbol of increasing cooperation between moss kwou and tehran. vladimir putin in a four hour long tv show defended the sale of a missile defense system to iran amid growing concerns from the obama administration that it could kpli case the on jg nuclear arms talks. translator: if some people are concerned that we started canceling sanctions then apparently our colleagues don t know that supplies of this types of systems are not including in the u.n. sanctions list. reporter: while the sale doesn t violate u.n. sanctions or even the framework agreed to in sits we recalled it does offer a glimpse into the strained relationship between the white hous