Wasn't that one of the intended targets on 9/11?
STEPPING BACK IN TIME, MARCH 30, 2004:
http://www.washtimes.com/world/20040330-120655-9785r.htm
"Chicago, L.A. towers were next targets"
By Paul Martin
THE WASHINGTON TIMES
ARTICLE SNIPPET: "LONDON — Khalid Shaikh Mohammed, al Qaeda's purported operations chief, has told U.S. interrogators that the group had been planning attacks on the Library Tower in Los Angeles and the Sears Tower in Chicago on the heels of the September 11, 2001, terror strikes.
Those plans were aborted mainly because of the decisive U.S. response to the New York and Washington attacks, which disrupted the terrorist organization's plans so thoroughly that it could not proceed, according to transcripts of his conversations with interrogators.
Mohammed told interrogators that he and Ramzi Yousuf, his nephew who was behind an earlier attack on the World Trade Center in 1993, had leafed through almanacs of American skyscrapers when planning the first operation.
"We were looking for symbols of economic might," he told his captors.
He specifically mentioned as potential targets the Library Tower in Los Angeles, which was "blown up" in the film "Independence Day," and the Sears Tower in Chicago. "