Last i knew in 1997-99 when my father was in Saudi Arab working with Saudis on different Air Defense projects those F-15s were removed from those airbases on behalf of united states and replaced with F-5s if they've brought them back i'll be delighted..
here you go sir:
King Faisal Air Base
When the Saudis purchased the first of the planes from the US in 1978, the Pentagon promised that they wouldn't be deployed at Tabuk. US Defense Secretary Harold Secretary Brown sought to alleviate fears of some Senators that the F-15 that would be sold to Saudi Arabia would be used against Israel. He explained the capabilities of this aircraft and also specified the assurances received from the government of Saudi Arabia. In a letter to Congress in 1978, before the US approved the first F-15 deal, Brown said "Questions have been raised concerning the possible basing of the F-15 aircraft at Tabuk air base. I would like to repeat to you the assurance given to me and other United States officials by the Saudi Arabian Government that Saudi Arabia will base the F-15 aircraft, not at Tabuk, but at Dhahran, Taif and possibly at Riyadh or Khamis Mushait. Basing the F-15 at the vulnerable Tabuk base could place in needless jeopardy these vital aircraft which will form the heart of the Saudi Arabian air defense system. In addition, Tabuk is not equipped to serve as an operating base for the F-15's, and could not be so equipped without extensive base for the F-15's, and could not be so equipped without extensive U.S. assistance which would not be provided. These practical considerations, of which Saudi Arabia is well aware, strengthen the assurances that the F-15's will not be based at Tabuk. "
On 18 December 2001 Prince Sultan bin Abdul Aziz, Second Deputy Premier, Minister of Defense and Aviation and Inspector General, opened the air control system project at King Faisal Air Base in Tabuk. Upon arrival at the venue, he was received by Major Gen. Abdulrahman Al Mirshed, commander of the northwest region, and Maj. Gen. Mohammed Al Sidais, commander of King Faisal Air Base in Tabuk.
About 50 F-15S warplanes were moved to the King Faisal Air Base in the northwestern town of Tabuk on the eve of the US-led war in Iraq in March 2003 with Israeli and US consent. Since the end of the war, the Saudis declined to return the aircraft to their bases in central and southern Saudi Arabia. On 03 Septebmer 2003 Tel Aviv asked Riyadh to move those American-made planes from the Tabuk military airport near Jordan in view of their threat to Israeli security. Saudi Arabia denied it was under US pressure to withdraw the fighters. Washington did not put pressure on us, and we would not tolerate pressure from anyone when it comes to sovereignty matters, Assistant Defense Minister Prince Khaled ibn Sultan said. We do not have F-16s, but rather F-15s, stationed in Tabuk, and we will keep them there because they are deployed inside our territory, Prince Khaled said.
In October 2003 Saudi Arabia staged an extensive air and naval exercise in the northwestern part of the kingdom and along the Red Sea near the Israeli border. The exercise, being run from the King Faisal Air Base. includes the F-15s controlled by the Saudi's E-3A AWACS aircraft as well as fast attack naval craft and air defense command. The exercise is the biggest the Saudis have staged in years.