Russia is sitting on the sidelines while Iran faces significant challenges, and it’s not likely to come to Tehran's aid. Here’s what you need to know:

• Russia's reluctance to intervene in Iran's struggles.
• Claims of other countries ready to support Iran with nuclear capabilities.
• Putin's possible gains from U.S. focus on Iran.
• Analysts questioning the validity of claims about nuclear support.
• Overall geopolitical implications for both nations.

Here's the full scoop.