that the terrorist plot uncovered in Florida was focused on the Sears Tower rather than on that great symbol of American power and prestige - The New York Times Building, located at 229 West 43rd Street New York, New York (see map below for directions).
The proximity of this greatest of American treasures to freeways and subways providing both easy access as well as a very safe means of egress means that someone bent on ill would have a very good chance of success. Additionally, the relatively low level of security maintained by the The New York Times as a means of expressing their desire to embrace all who enter has long been considered a lure of sorts.
Then there is the easily acquired satellite imagery that allows those seeking the precise location (40 45"26.00'N 73 59"14.59') of the building to easily identify it from the air.
One might ponder whether the United States could withstand the loss of such a tremendously meaningful edifice.