In 2004 Nussbaum won a jury verdict in a New York federal court on behalf of the developer of the World Trade Center, Larry Silverstein, against a number of major insurance companies. After a trial lasting more than a month, the jury found that what occurred on September 11, 2001, when two towers were destroyed by two planes, was not a single event, as claimed by the insurance companies, but was, under the terms of the insurance agreements then in force, two separate events. This significantly increased the amount of insurance due and resulted in a multi-billion payment to the developer for the rebuilding of the Center.