After doing so research I came up with some interesting facts. Mind you this is just speculation and nothing confirmed unless stated.
In feb of 2001 Vornado entered into and was the high bidder for the 99 year lease of the WTC - Fact (http://www.vno.com/press/display.phtml?id=2442)
In March of 2001 Vornado, back out of the deal for the WTC and allowed Larry Silverstein to purchase the deal. - Fact (http://www.vno.com/press/display.phtml?id=2386)
Robert P. Kogod a trustee of Vornado Realty trust serves as "Special Assistant to the Secretary of the Department of Defense" - Fact (http://www.muckety.com/U-S-Department-of-Defense/5001894.muckety) (http://www.vno.com/corporate_governance/robert_p_kogod_2.phtml) (http://www.muckety.com/Robert-P-Kogod/2134.muckety)
Now, although I do not know if the US really new that the WTC was going to be attacked before hand or not, I can not say, but it seems way to much of a coincidence that VNO pulled out of the deal 6 months before the attack almost to the day. - Fact (http://www.vno.com/press/display.phtml?id=2386)
So along with having connections in the DOD, I'm sure they they must have some connections in NYC's govt as well. (speculation)