A U.S. Air Force F-15 Eagle and an F-16C Fighting Falcon fly over the skies of Fresno, Calif. Both aircraft are assigned to the 144th Fighter Wing, California Air National Guard, Fresno, Calif., Nov., 7, 2013. The 144th Fighter Wing says "farewell" to the F-16C Fighting Falcon after converting to the F-15 Eagle for the unit's guard mission. (U.S. Air Force photo by Master Sgt. Roy Santana/Released)