Russia and Belarus have completed the formation of their joint air defense system in the Eastern European region of collective security, Chief of the General Staff - First Deputy Commander of the Russian Aerospace Forces Lieutenant General Pavel Kurachenko told reporters on Wednesday. 
"The agreement’s implementation has been completed, and the further efforts will be focused on joint combat air defense duty and joint operational and combat training activities," he said. 
Kurachenko recalled that the agreement between Russia and Belarus on the joint protection of the external border of the Union State in the airspace and the creation of the joint regional system was signed and ratified in 2009.

Source: QNA