Eight Saudi Royal Air Forces F-15s planes arrived yesterday in Nellis Air Base, south of the USA state of Nevada, to participate in the exercise "Red Flag-4" the participation in which was approved by Vice Custodian of the Two Holy Mosques Prince Sultan bin Abdulaziz Al Saud. Commander of the exercise group Lieutenant colonel Prince Turki bin Abdullah bin Abdulaziz Al Saud hailed proficiency of these aircraft's pilots who managed to fly thousands of kilometers in all weather conditions and with the highest levels of safety and professionalism from the territories of the Kingdom until they reached the base of Nellis. In a speech during a reception on this occasion, he spoke on the details of the preparations for the journey and the exercise which is held once a every two years and is one of the oldest air combat exercises internationally. The Kingdom of Saudi Arabia is participating in it for the fourth time and is the only Arab country to participate in the exercise this year after receiving an invitation for participation from the U.S. Air Force. For the first time, the exercise includes the participation of Saudi Land Forces represented by the forces of the paratroopers' units of the Special Security Forces (Battalion 85).