New York Governor David Paterson has given World Trade Center site developer Larry Silverstein an ultimatum in talks over his ground zero lease. He says the site could be redesigned without Silverstein's buildings.

Paterson wrote a letter Monday renewing an offer to help finance two of Silverstein's planned three office towers at the site.

Silverstein would have to put up over $600m of his own money to receive financial backing for the second tower. A spokesman didn't immediately return a telephone call Monday.

Wall Street Journal