<p>May 8, 2003 -- The future of Ground Zero became mired in deeper legal troubles yesterday, as trade center leaseholder Larry Silverstein went to court to force an insurance company to pay up on the destroyed No. 7 World Trade Center. The litigation around the building, which Silverstein once declared would be the first to rise again at Ground Zero, also raises questions about Gov. Pataki's plan to have Silverstein break ground next summer on the world's tallest building.</p>