Relations between Iran and Russia continue to warm amidst an increasingly unstable geopolitical climate. The two allies signed a cooperative agreement this week, signaling Tehran and Moscow will lean on each other more as they similarly face a slew of Western sanctions.

Just three days before US President-elect Donald Trump returns to the White House, Russia and Iran have finally signed a “comprehensive partnership agreement,” a deal that had been in the works for months.

The two countries sign a 20-year treaty covering areas ranging from defence and technology to energy and trade.

Russian President Vladimir Putin and Iranian President Masoud Pezeshkian met in Moscow on Friday to sign a broad 20-year treaty. CBS News national security contributor Sam Vinograd breaks down how it could affect U.