^ They aren't calling anything "6" yet.
curbed.com
WTC Special Report #1: Freedom Tower Rises
Monday, November 24, 2008
by Sarah Hromack
Sweet, sweet Freedom Tower: One day, we will see your spire climb all the way up to 1,776 gloriously patriotic feet. Not until the fourth quarter of 2013, however, if the Port Authority's most recent progress update is to be believed. With construction costs on the rise, the David Childs-designed tower will cost $3.1 billion. (Within 7% of the original estimate. Bargain!) Bonus fun fact: over 13,000 cubic yards of concrete have already been poured down the Freedom Tower's throat, though that number is likely higher by now. And now that the concrete's a flowin', the real challenge will be finding tenants to fill that 2.6 million square feet of office space. A worry for another day.