A US military delegation has returned to Washington empty handed after no result came out of negotiations held in Ankara between Turkey and American representatives over the use of the US Air Force İncirlik Air Base.(..)
The information further indicated that the US military delegation gave a list of four demands related to the base:

İncirlik to be extensively opened to US soldiers for the fight against ISIS

Both armed and unarmed unmanned aerial vehicles (UAV) to be deployed at İncirlik for use in both intelligence and operational means.

İncirlik to be used as a logistics center and supply base. Tanker planes to be used to give support to aircraft of coalition nations serving in the fight against ISIS. The transfer of personnel, equipment, arms and ammunition from US Forces in Europe will be done at İncirlik

Linked to the first article, Turkish airspace to be opened to the aircraft of coalition nations. Besides İncirlik, the US administration wishes to benefit from airports in Hatay, Şanlıurfa, Diyarbakır, and Batman for both operational and logistic purposes.