Between the Vietnam War and 1991 , 15 AF units and assets consisted of reconnaissance aircraft ( SR-71 until 1989 , U-2 ) , bombers ( B-52D until 1984 , B-52G , B-52H and B-1B ) , aerial refueling ( KC-135 , KC-10 ) , and intercontinental ballistic missiles ( Titan II until 1984 , Minuteman II/III , Peacekeeper ) .
ADP DET PROPN PROPN CCONJ NUM , NUM PROPN NOUN CCONJ NOUN VERB ADP NOUN NOUN ( NUM ADP NUM , NOUN ) , NOUN ( VERB ADP NUM , NOUN , ADV CCONJ PROPN ) , ADJ NOUN ( PROPN , NUM ) , CCONJ ADJ ADJ NOUN ( PROPN PROPN ADP NUM , PROPN PROPN , PROPN ) .