GAZIANTEP, TURKEY - JULY 24: Turkish Army's tanks and artilleries stand guard as they are alerted, in southeastern Turkey's border city Gaziantep on July 24, 2015. Yesterday a gunfire to a Turkish border post from Syria across the border killed a Turkish non-commissioned officer and wounded two sergeants in Turkeys southern Kilis province, according to official sources. Turkish forces responded by targeting positions across the border with artilleries and airstrikes. Reports suggested at least one Daesh militant was killed. (Photo by Ensar Ozdemir/Anadolu Agency/Getty Images)