The decision over which building gets the go ahead lies with the Lower Manhattan Development Corporation (LMDC) and the Port Authority of New York and New Jersey.

BBC: Sky-high WTC finalists chosen

She has no direct role in the LMDC, but she used two meetings on Monday morning to outline her vision of what the priorities need to be.

BBC: Options for twin towers site revealed

The Lower Manhattan Development Corporation (LMDC), the agency charged with redeveloping the southern tip of Manhattan, and the Port Authority of New York and New Jersey, a regional transport agency, are working in tandem to redevelop the World Trade Center site.

BBC: World Trade Center architects aim high