Its no secret the US has airbases in various Gulf states. The Fifth Fleet is based Bahrain so the fact they have UAVS in Saudi Arabia is not exactly controversial. What is more controversial is the fact that despite having no peace agreements with Iraq Israel does has a fleet of combat UAVS based in the Kurdish regions of northern Iraq. which can be used for spying and firing missiles at any any targets Israel wants gone. The long arms of the IDFare getting longer with the UAVS in Iraq and it also has an electronic warfare and submarine fuelling facilities in Eritrea.
U.S., allies conduct 20 air strikes in Syria and Iraq against ISIS, says U.S. military (Reuters)
from the article: Secret American drone airbase in Saudi Arabia exposed