U.S. troops at Turkey’s Incirlik air base were at the highest force protection level,  after power was cut off at the base and the Turkish government closed the airspace around the site in the hours following a foiled military coup attempt Turkish officials told ABC News they believe Turkish planes docked at Incirlik Air Base took part in Friday night's coup attempt Turkey allows the United States to use the air base for operations associated with its air campaign against ISIS in Iraq and Syria There are 2,200 U.S. personnel in Turkey including 1,500 stationed at Incirlik