Details on the proposals from the 4 finalists for the here. The images above are plucked from the design boards of (left to right) Field Operations and Diller Scofidio + Renfr, Steven Holl Architects, TerraGRAM: Michael Van Valkenburgh Associates and Zaha Hadid Architects. These aren't final plans, just design directions. The winner will be announced at the end of the Summer. If you're in NYC, you can see these in person at the Center for Architecture until 14 August.