In this photo released by the Turkish Presidency Press Office, Turkish President Abdullah Gul, right, meets with Gen. Mehmet Erten, Commander of the Turkish Air Force, in Istanbul Turkey, Monday, June 25, 2012. Upon Turkey's request, NATO will hold a meeting Tuesday in Brussels over article 4 of its charter concerning Friday's incident, when a Turkish warplane was shot down by Syria. (AP Photo/Mustafa Oztartan, Turkish Presidency Press Office, HO)