ANSWER: S-300
Explanation:
S. Davis Iran on 17th April 2016 unveiled S-300 missile system parts at army parade in Tehran. It was a long-awaited air defence system ordered from Russia.
- A deal between Iran and six world powers over its nuclear activities which caused lifting of sanctions in January 2016 removed the barriers to delivery but the fully operational system is still awaited.
- Iran insists the system is necessary to protect itself from threats of attack, including possible bombing of its nuclear facilities, and the S-300 would allow early detection of approaching aircraft.
- The S-300 is a series of Soviet-Russian long range surface-to-air missile systems produced by NPO Almaz, based on the initial S-300P version.
- It was first deployed by Russia in the year1979.
