"The architect says that having calculated the arc of the sun, a wedge of natural light would funnel visitors to the memorial site, and that every September 11 between 8:46 a.m., when the first tower was struck by a plane, and 10:28 a.m., when the second tower collapsed, no shadows will be cast by his buildings."
I love that part of the design, though it will take almost a decade to finish the buildings, it will surely be a sight to be seen when completed.
Also, I think it's good that we are not going to fill up the entire building with offices again, not only for safety but for the fact that we really don't need to make this another business center, it's more than that and both of the final designs focused on culture rather than just money.