sentences:  The obsolescent F-80 day fighters were upgraded to the all-weather/day/night F-86D Sabre Interceptor by the end of the year.In June 1959 the squadron traded their F-86Ds for the upgraded F-86L Sabre Interceptor with uprated afterburning engines and new electronics.In July 1960 the unit became one of the first to transition to the F-102A Delta Dagger Mach 1.2 all-weather interceptor and began a 24-hour alert to guard the Texas Gulf coast.