sentences:  Beginning in 1960, the 112th Fighter Interceptor Group upgraded to the supersonic F-102A Delta Dagger interceptor.These Air Guard pilots stood runway alert for 24 hours a day, seven days a week at the Greater Pittsburgh Airport ready to scramble regardless of the weather conditions to intercept any unidentified aircraft approaching southward from the Canada–US border or toward the United States from the Atlantic Coast, their F-102A Delta Daggers fully armed with two heat seeking missiles and four radar-guided missiles as well as 2.75-inch rockets.With air defense becoming less critical in the early 1960s, the 103d FIS at Philadelphia moved to an Air Transport mission in 1962.