New York developer Larry Silverstein appears to have the upper hand as he prepares for yet another high-level negotiation with New York and New Jersey officials on the redevelopment of the World Trade Center site.

Silverstein, who signed a 99-year-lease for the World Trade Center six weeks before the 11 Sept terrorist attack, has been sparring ever since with the Port Authority of New York and New Jersey, the government agency that owns the site.

He could plunge the entire site, including the memorial, into further delays by taking the Port Authority to court over construction deadlines the agency has missed.

Four towers are planned for the World Trade Center site. Click image to see more information on the towers, transit center and memorial.

Any delay is politically unpalatable to the governors who control the agency -- New York's David Paterson and New Jersey's Jon Corzine. They are both running for re-election in the next two years and are under pressure to get things moving.

Wall Street Journal