【正文】
.5 BILLION DOLLARS,BEGAN IN 1966,CONSTRUCTION,By the end of 1970, one of the two towers was ready for its first occupants. At the moment the upper floors had yet to be completed.,NEW YORK,A DREAM,IN 1972,Construction was completed in 1973,THE UPPER FLOORS,WERE FINISHED,THE WORLD TRADE CENTER WAS A REALITY,,AND AN ARCHITECTURAL JEWEL,AN ECONOMY SYMBOL,IN USA,THE