Iran's President Hassan Rouhani in Shanghai, May 22, 2014.
Carlos Barria / Reuters

Barely a week goes by without Iran and Russia announcing some joint adventure in the sea, on land, or in space. Just last week, as Iran’s minister of communications and information technology, Mahmoud Vaezi, made his way to Moscow, he promised “a new phase in all aspects” of relations between the two countries. And on Monday, Russia announced that the deal to supply Iran with advanced surface-to-air S-300 missiles had “come into force.” These are all part of an unprecedented partnership between Iran and Russia, forged in the aftermath of the nuclear deal and cemented with cooperation on Syria.

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