Michael Rubin noted this WSJ story earlier, but it’s worth highlighting again:

MOSCOW — Russian Foreign Minister Sergei Lavrov made it clear Thursday that Moscow wouldn’t back any new rounds of tough sanctions against Iran in the United Nations Security Council, and he dismissed a U.S. timetable for securing progress from Iran on ending its nuclear-fuel program.
Mr. Lavrov’s comments in Moscow led U.S. officials to acknowledge that new U.N. sanctions against Iran were now unlikely in the near term — endangering a major element of President Barack Obama’s high-profile strategy for diplomacy in the Middle East. “We’re pretty disappointed with the Russian position so far,” a senior U.S. official said.
The development also appeared a blow to hopes that the Obama administration’s “reset” of relations with Russia would lead to Moscow supporting a top U.S. foreign-policy priority