Iran believes its contract to buy S-300 missile defense systems from Russia is legitimate and expects it to be fulfilled, Iran’s ambassador to Russia said Tuesday.

Mehdi Sanai said the systems “are defensive, so no international laws, norms and rules are violated.”

Sanai said that he had discussed the issue with Russia’s Foreign Minister Sergei Lavrov during the latter’s visit to Iran, and noted Moscow’s “good will in its resolution.” […]