facilitate a below ground east–west passageway that connects to the various modes of transportation in Lower Manhattan, from the Fulton Center to the Battery Park City Ferry Terminal. Furthermore, to replace the lost retail space from the original mall at the World Trade Center, significant portions of the Hub are devoted to the new Westfield World Trade Center mall. Background After the September 11 attacks, officials proposed a $7 billion redesign of transit in Lower Manhattan. This included a new PATH terminal, the Fulton Center, the South Ferry/Whitehall Street terminal further downtown, and the reconstruction of the West Side Highway. Other development projects to restart Lower Manhattan's economy were also proposed, and a new PATH terminal was seen as instrumental in making this happen. In August 2002, the U.S. government allocated $4.5 billion to build a terminal linking the subway and PATH stations at the World Trade Center site. Four locations were considered, and it was ultimately decided to build the new terminal four levels underground, along the base of the World Trade Center "bathtub". A large transit station was not part of the 2003 Memory Foundations master plan for the site by Daniel Libeskind, which called for a smaller station along the lines of the original subterranean station that existed beneath the World Trade Center. Libeskind's design proposed that the current station house's site be left as an open plaza, forming a "Wedge of Light" so that sun rays around the autumnal equinox would hit the World Trade Center footprints each September. The plaza would have included a wedge whose lines showed the sun's rays at 8:46 a.m. and 10:28 a.m. on September 11 of each year. These times respectively represented when American Airlines Flight 11 crashed into the North Tower and when it collapsed. Redesign In early 2004, the Port Authority, which owns the land, modified the Libeskind plan to include a large transportation station downtown, intended to rival Penn Station and Grand Central Terminal. Calatrava was hired as the architect for this new, $2 billion design, and he revealed his plan in January 2004. Calatrava's design called for an above-ground station house (now the Oculus) with curved supports that extended outward, like wings. These wings would run the length of the concourse, which would run from Church Street in the east to the PATH station under Greenwich Street in the west. The building itself would be located