Its New York office, on the 101st-105th floors of One World Trade Center, lost 685 employees in the September 11, 2001 Terrorist Attack, considerably more than any other employer, including the FDNY. This was about 2/3 of its employees.
eSpeed had sponsored the U.S. Naval War College "NewRuleSets" research program, which used the two towers of the World Trade Center with a lightning bolt through them as its logo. It had been known since an earlier attack on the WTC in 1993 that it was a major target of asymmetric warfare and terrorism.
See also: One World Trade Center tenants
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