Iran tested various types of medium-range and low-altitude missile systems during the second stage of a joint air defense exercise of the Armed Forces and the Islamic Revolutionary Guards Corps (IRGC), which was held on Tuesday. 

The four-day military drill, entitled the Defenders of the Sky of Velayat 4, is being conducted in eastern Iran in an area covering 850,000 square kilometers with the participation of 8000 Iranian military forces.