Silverstein Properties cannot be held responsible for the collapse ofa third World Trade Center tower that tumbled a few hours after thetwin towers were struck in the 9/11 terrorist attacks, a federal appealscourt has ruled.A group of plaintiffs led by Con Edison and several insurancecompanies brought a suit against Larry Silverstein’s company, blamingalleged structural deficiencies for the fall of 7 World Trade Center.As the north tower plunged, debris fell into neighboring No. 7 andtouched off a fire that firefighters were unable to contain, the courtsaid.It would be “simply incompatible with common sense and experience tohold that defendants were required to design and construct a buildingthat would survive the events of Sept. 11, 2001,” the U.S. Court ofAppeals for the Second Circuit in Manhattan said.Case closede, move along.