AP � Iran�s elite Revolutionary Guard has displayed the country�s sophisticated Russian-made S-300 air defense system in central Tehran.

This is the first time that the S-300 air defense system has been displayed in public.

The public show in Tehran�s Baharestan square near the Parliament building square exhibited different missile systems, including ballistic missiles, solid-fuel surface-to-surface Sejjil missiles and the liquid-fuel Ghadr.

The IRGC prepared the show for the annual Defense Week, marking the 37th anniversary of the 1980s Iran-Iraq war.

U.S. President Donald Trump signed in August a bill imposing mandatory penalties on those involved in Iran�s controversial ballistic missile program and anyone who does business with them.