Gorbachev again refused to make any changes to the status of Nagorno Karabakh, which remained part of Azerbaijan. Instead he sacked both Republics' Communist Party Leaders: On May 21, 1988, Karen Demirchian was replaced by Suren Harutyunyan as First Secretary of the Communist Party of Armenia. However, Harutyunyan quickly decided to run before the nationalist wind and on May 28, allowed Armenians to unfurl the red-blue-gold First Armenian Republic flag for the first time in almost 70 years. On June 15, 1988, the Armenian Supreme Soviet adopted a resolution formally approving the idea of Nagorno Karabakh joining Armenia. Armenia, formerly one of the most loyal Republics, had suddenly turned into the leading rebel republic. On July 5, 1988, when a contingent of troops was sent in to remove demonstrators by force from Yerevan's Zvartnots International Airport, shots were fired and one student protester was killed. In September, further large demonstrations in Yerevan led to the deployment of armored vehicles. In the autumn of 1988 almost all the 200,000 Azerbaijani minority in Armenia was expelled by Armenian Nationalists, with over 100 killed in the process – this, after the Sumgait pogrom earlier that year carried out by Azerbaijanis against ethnic Armenians and subsequent expulsion of all Armenians from Azerbaijan. On November 25, 1988, a military commandant took control of Yerevan as the Soviet government moved to prevent further ethnic violence.