World Trade Center design flaw could cost millions

One World Trade Center overlooks the ground zero memorial site, Saturday, Sept. 10, 2011, in New York. Ceremonies will be held at the site Sunday for the 10th anniversary of the September 11 attacks. (AP Photo/Mark Lennihan)

January 31, 2012 9:29:28 AM PST
The agency building the new World Trade Center says a design flaw could cost it millions of dollars.